settings-schema.json

{
  "allow-current-workspace": {
    "type": "checkbox",
    "default": true,
    "description": "Use current workspace when there are no other windows",
    "tooltip": "Avoid moving a fullscreen window to a different workspace when there are no other windows in the current one. Setting this option to false resembles macOS-like behavior, but might mess up with dynamic workspaces."
  }
}