diff --git a/lib/main.coffee b/lib/main.coffee
index 41a53af..47a8e0a 100644
--- a/lib/main.coffee
+++ b/lib/main.coffee
@@ -1,34 +1,41 @@
 root = document.documentElement
+themeName = 'solarized-one-light-ui'
+
 
 module.exports =
   activate: (state) ->
-    atom.config.observe 'solarized-one-light-ui.fontSize', (value) ->
+    atom.config.observe "#{themeName}.fontSize", (value) ->
       setFontSize(value)
 
-    atom.config.observe 'solarized-one-light-ui.tabSizing', (value) ->
+    atom.config.observe "#{themeName}.tabSizing", (value) ->
       setTabSizing(value)
 
-    atom.config.observe 'solarized-one-light-ui.hideDockButtons', (value) ->
+    atom.config.observe "#{themeName}.tabCloseButton", (value) ->
+      setTabCloseButton(value)
+
+    atom.config.observe "#{themeName}.hideDockButtons", (value) ->
       setHideDockButtons(value)
 
+    atom.config.observe "#{themeName}.stickyHeaders", (value) ->
+      setStickyHeaders(value)
+
     # DEPRECATED: This can be removed at some point (added in Atom 1.17/1.18ish)
     # It removes `layoutMode`
-    if atom.config.get('solarized-one-light-ui.layoutMode')
-      atom.config.unset('solarized-one-light-ui.layoutMode')
+    if atom.config.get("#{themeName}.layoutMode")
+      atom.config.unset("#{themeName}.layoutMode")
 
   deactivate: ->
     unsetFontSize()
     unsetTabSizing()
+    unsetTabCloseButton()
     unsetHideDockButtons()
+    unsetStickyHeaders()
 
 
 # Font Size -----------------------
 
 setFontSize = (currentFontSize) ->
-  if Number.isInteger(currentFontSize)
-    root.style.fontSize = "#{currentFontSize}px"
-  else if currentFontSize is 'Auto'
-    unsetFontSize()
+  root.style.fontSize = "#{currentFontSize}px"
 
 unsetFontSize = ->
   root.style.fontSize = ''
@@ -37,19 +44,43 @@ unsetFontSize = ->
 # Tab Sizing -----------------------
 
 setTabSizing = (tabSizing) ->
-  root.setAttribute('theme-solarized-one-light-ui-tabsizing', tabSizing.toLowerCase())
+  root.setAttribute("theme-#{themeName}-tabsizing", tabSizing.toLowerCase())
 
 unsetTabSizing = ->
-  root.removeAttribute('theme-solarized-one-light-ui-tabsizing')
+  root.removeAttribute("theme-#{themeName}-tabsizing")
+
+
+# Tab Close Button -----------------------
+
+setTabCloseButton = (tabCloseButton) ->
+  if tabCloseButton is 'Left'
+    root.setAttribute("theme-#{themeName}-tab-close-button", 'left')
+  else
+    unsetTabCloseButton()
+
+unsetTabCloseButton = ->
+  root.removeAttribute("theme-#{themeName}-tab-close-button")
 
 
 # Dock Buttons -----------------------
 
 setHideDockButtons = (hideDockButtons) ->
   if hideDockButtons
-    root.setAttribute('theme-solarized-one-light-ui-dock-buttons', 'hidden')
+    root.setAttribute("theme-#{themeName}-dock-buttons", 'hidden')
   else
     unsetHideDockButtons()
 
 unsetHideDockButtons = ->
-  root.removeAttribute('theme-solarized-one-light-ui-dock-buttons')
+  root.removeAttribute("theme-#{themeName}-dock-buttons")
+
+
+# Sticky Headers -----------------------
+
+setStickyHeaders = (stickyHeaders) ->
+  if stickyHeaders
+    root.setAttribute("theme-#{themeName}-sticky-headers", 'sticky')
+  else
+    unsetStickyHeaders()
+
+unsetStickyHeaders = ->
+  root.removeAttribute("theme-#{themeName}-sticky-headers")
diff --git a/package.json b/package.json
index ee388c0..09d9d22 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "solarized-one-light-ui",
   "theme": "ui",
-  "version": "1.10.10",
+  "version": "1.12.0",
   "description": "Solarized One light UI Theme for Atom. A perfect companion for the Solarized Dark Syntax Theme.",
   "keywords": [
     "light",
@@ -20,14 +20,22 @@
   "configSchema": {
     "fontSize": {
       "title": "Font Size",
-      "description": "Change the UI font size. Needs to be between 8 and 20. In Auto mode, the Font Size will automatically change based on the window size.",
-      "type": [
-        "integer",
-        "string"
+      "description": "Change the font size for the UI.",
+      "type": "integer",
+      "default": 12,
+      "enum": [
+        10,
+        11,
+        12,
+        13,
+        14,
+        15,
+        16,
+        17,
+        18,
+        19,
+        20
       ],
-      "minimum": 8,
-      "maximum": 20,
-      "default": "Auto",
       "order": 1
     },
     "tabSizing": {
@@ -42,12 +50,29 @@
       ],
       "order": 2
     },
+    "tabCloseButton": {
+      "title": "Tab Close Button",
+      "description": "Choose the position of the close button shown in tabs.",
+      "type": "string",
+      "default": "Right",
+      "enum": [
+        "Left",
+        "Right"
+      ],
+      "order": 3
+    },
     "hideDockButtons": {
       "title": "Hide dock toggle buttons",
       "description": "Note: When hiding the toggle buttons, opening a dock needs to be done by using the keyboard or other alternatives.",
       "type": "boolean",
       "default": "false",
-      "order": 3
+      "order": 4
+    },
+    "stickyHeaders": {
+      "title": "Make tree-view project headers sticky",
+      "type": "boolean",
+      "default": "true",
+      "order": 5
     }
   }
 }
diff --git a/spec/theme-spec.coffee b/spec/theme-spec.coffee
index cc00160..cdfc829 100644
--- a/spec/theme-spec.coffee
+++ b/spec/theme-spec.coffee
@@ -1,25 +1,36 @@
-describe "Solarized One Light UI Theme", ->
+themeName = 'solarized-one-light-ui'
+
+describe "#{themeName} theme", ->
   beforeEach ->
     waitsForPromise ->
-      atom.packages.activatePackage('solarized-one-light-ui')
+      atom.packages.activatePackage(themeName)
 
   it "allows the font size to be set via config", ->
-    expect(document.documentElement.style.fontSize).toBe ''
+    expect(document.documentElement.style.fontSize).toBe '12px'
 
-    atom.config.set('solarized-one-light-ui.fontSize', '10')
+    atom.config.set("#{themeName}.fontSize", '10')
     expect(document.documentElement.style.fontSize).toBe '10px'
 
-    atom.config.set('solarized-one-light-ui.fontSize', 'Auto')
-    expect(document.documentElement.style.fontSize).toBe ''
-
   it "allows the tab sizing to be set via config", ->
-    atom.config.set('solarized-one-light-ui.tabSizing', 'Maximum')
-    expect(document.documentElement.getAttribute('theme-solarized-one-light-ui-tabsizing')).toBe 'maximum'
+    atom.config.set("#{themeName}.tabSizing", 'Maximum')
+    expect(document.documentElement.getAttribute("theme-#{themeName}-tabsizing")).toBe 'maximum'
 
   it "allows the tab sizing to be set via config", ->
-    atom.config.set('solarized-one-light-ui.tabSizing', 'Minimum')
-    expect(document.documentElement.getAttribute('theme-solarized-one-light-ui-tabsizing')).toBe 'minimum'
+    atom.config.set("#{themeName}.tabSizing", 'Minimum')
+    expect(document.documentElement.getAttribute("theme-#{themeName}-tabsizing")).toBe 'minimum'
+
+  it "allows the tab close button to be shown on the left via config", ->
+    atom.config.set("#{themeName}.tabCloseButton", 'Left')
+    expect(document.documentElement.getAttribute("theme-#{themeName}-tab-close-button")).toBe 'left'
 
   it "allows the dock toggle buttons to be hidden via config", ->
-    atom.config.set('solarized-one-light-ui.hideDockButtons', true)
-    expect(document.documentElement.getAttribute('theme-solarized-one-light-ui-dock-buttons')).toBe 'hidden'
+    atom.config.set("#{themeName}.hideDockButtons", true)
+    expect(document.documentElement.getAttribute("theme-#{themeName}-dock-buttons")).toBe 'hidden'
+
+  it "allows the tree-view headers to be sticky via config", ->
+    atom.config.set("#{themeName}.stickyHeaders", true)
+    expect(document.documentElement.getAttribute("theme-#{themeName}-sticky-headers")).toBe 'sticky'
+
+  it "allows the tree-view headers to not be sticky via config", ->
+    atom.config.set("#{themeName}.stickyHeaders", false)
+    expect(document.documentElement.getAttribute("theme-#{themeName}-sticky-headers")).toBe null
diff --git a/styles/config.less b/styles/config.less
index ef859c4..06f5e3f 100644
--- a/styles/config.less
+++ b/styles/config.less
@@ -1,13 +1,18 @@
 
-// Tabs ----------------------------------------------
+// Theme config
+// This gets changed from the theme settings
 
 @theme-tabsizing: ~'theme-@{ui-theme-name}-tabsizing';
 @theme-dockButtons: ~'theme-@{ui-theme-name}-dock-buttons';
+@theme-stickyHeaders: ~'theme-@{ui-theme-name}-sticky-headers';
+@theme-closeButton: ~'theme-@{ui-theme-name}-tab-close-button';
 
-@tab-min-width: 7em; // ~ icon + 6 characters
 
+// Tabs ----------------------------------------------
+
+@tab-min-width: 7em; // ~ icon + 6 characters
 
-// Even (default) ---------------
+// Even (default)
 
 .tab-bar {
   .tab,
@@ -31,7 +36,7 @@
 }
 
 
-// Maximum (full width) ---------------
+// Maximum (full width)
 
 [@{theme-tabsizing}="maximum"] .tab-bar {
   .tab,
@@ -41,7 +46,7 @@
 }
 
 
-// Minimum (show long paths) ---------------
+// Minimum (show long paths)
 
 [@{theme-tabsizing}="minimum"] .tab-bar {
   .tab,
@@ -59,6 +64,19 @@
 }
 
 
+// Tabs: close button position  ------------------------------
+
+[@{theme-closeButton}="left"] {
+
+  .tab-bar .tab {
+    .close-icon {
+      right: auto;
+      left: @icon-padding-right;
+    }
+  }
+
+}
+
 
 // Hide docks toggle buttons ------------------------------
 
@@ -75,3 +93,44 @@
   }
 
 }
+
+
+// Sticky Projects ------------------------------
+
+[@{theme-stickyHeaders}="sticky"] {
+
+  .tree-view {
+    .project-root-header {
+      position: sticky;
+      top: 0;
+      z-index: 1;
+      padding-left: 5px;
+      padding-right: 10px;
+      border-bottom: 1px solid @base-border-color;
+      background-color: @tree-view-background-color;
+    }
+    .project-root.project-root {
+      margin-left: -5px;
+      margin-right: -10px;
+
+      // Disable selection
+      &::before {
+        display: none;
+      }
+
+      // Add selection back
+      &.selected .project-root-header {
+        background-color: @background-color-selected;
+      }
+    }
+    &:focus .selected .project-root-header.project-root-header  {
+      background: @button-background-color-selected;
+    }
+
+    // Fix sticky header from covering auto-revealed items
+    .list-item.selected {
+      padding-top: @ui-tab-height;
+      margin-top: -@ui-tab-height;
+    }
+  }
+}
diff --git a/styles/docks.less b/styles/docks.less
index 4c72f5d..c91681e 100644
--- a/styles/docks.less
+++ b/styles/docks.less
@@ -33,10 +33,10 @@
 
 // Make toggle buttons cover ^ border
 .atom-dock-toggle-button.left {
-  margin-left: -1px;
+  margin-left: -2px;
 }
 .atom-dock-toggle-button.right {
-  margin-right: -1px;
+  margin-right: -2px;
 }
 .atom-dock-inner:not(.atom-dock-open) .atom-dock-toggle-button.bottom {
   margin-bottom: -1px;
diff --git a/styles/modal.less b/styles/modal.less
index c793b8f..7bc0a42 100644
--- a/styles/modal.less
+++ b/styles/modal.less
@@ -80,6 +80,11 @@ atom-panel.modal {
     position: relative; // fixes stacking order
   }
 
+  .command-palette {
+    padding: 1px; // prevents the box-shadow of the input from being cut off
+    background-color: @overlay-background-color;
+  }
+
 
   // Container
   &:before {
diff --git a/styles/status-bar.less b/styles/status-bar.less
index 43aa36b..70f3a99 100644
--- a/styles/status-bar.less
+++ b/styles/status-bar.less
@@ -82,4 +82,15 @@
       cursor: default;
     }
   }
+
+  // Remove margin for icon without text
+  status-bar-launch-mode::before, // Launch mode
+  .about-release-notes::before, // New release squirrel
+  .PortalStatusBarIndicator .icon::before, // Teletype
+  .icon.is-icon-only::before {
+    margin-right: 0;
+  }
+  .github-PushPull-label.is-push:empty { // GitHub package when nothing to push
+    margin-right: -.25em;
+  }
 }
diff --git a/styles/tabs.less b/styles/tabs.less
index e7d96e1..d211d58 100644
--- a/styles/tabs.less
+++ b/styles/tabs.less
@@ -217,16 +217,19 @@
 
 // Active pane marker --------------
 
-atom-pane.active .tab.active:before {
-  content: "";
-  position: absolute;
-  pointer-events: none;
-  z-index: 2;
-  top: 0;
-  left: -1px; // cover left border
-  bottom: 0;
-  width: 2px;
-  background: @accent-color;
+atom-pane-axis > atom-pane.active,
+atom-pane-container > atom-pane.pane {
+  .tab.active:before {
+    content: "";
+    position: absolute;
+    pointer-events: none;
+    z-index: 2;
+    top: 0;
+    left: -1px; // cover left border
+    bottom: 0;
+    width: 2px;
+    background: @accent-color;
+  }
 }
 
 // hide marker in docks
diff --git a/styles/ui-variables-custom.less b/styles/ui-variables-custom.less
index 6f068b8..10babc6 100644
--- a/styles/ui-variables-custom.less
+++ b/styles/ui-variables-custom.less
@@ -92,8 +92,8 @@
 @input-selection-color:             mix( hsv( @ui-hue, 33%, 95%), hsl( @ui-hue, 100%, 98%), @accent-luma * 2 ); // mix hsv + hsl (favor hsl for dark, hsv for light colors)
 @input-selection-color-focus:       mix( hsv( @ui-hue, 44%, 90%), hsl( @ui-hue, 100%, 94%), @accent-luma * 2 ); // mix hsv + hsl (favor hsl for dark, hsv for light colors)
 
-@overlay-backdrop-color:            hsl(@ui-hue, @ui-saturation*0.4, @ui-lightness*0.72);
-@overlay-backdrop-opacity:          .8;
+@overlay-backdrop-color:            hsl(@ui-hue, @ui-saturation*0.4, @ui-lightness*0.8);
+@overlay-backdrop-opacity:          .66;
 
 @progress-background-color:         @accent-color;
 
diff --git a/styles/ui-variables.less b/styles/ui-variables.less
index d232ca7..c8dc10c 100644
--- a/styles/ui-variables.less
+++ b/styles/ui-variables.less
@@ -94,4 +94,4 @@
 
 
 // Font -----------------
-@font-family: 'BlinkMacSystemFont', 'Lucida Grande', 'Segoe UI', Ubuntu, Cantarell, sans-serif;
+@font-family: system-ui;