utils: Use an extra parameter for property injector constructor

By adding parameters in commit 611690c we ended up hiding the base
object constructor parameter, and so the support for automatic
disconnection on parent object destruction.

Fixes: #2297

appIconsDecorator.js

@@ -27,7 +27,8 @@ export class AppIconsDecorator {
     constructor() {
         this._signals = new Utils.GlobalSignalsHandler();
         this._methodInjections = new Utils.InjectionsHandler();
-        this._propertyInjections = new Utils.PropertyInjectionsHandler({allowNewProperty: true});
+        this._propertyInjections = new Utils.PropertyInjectionsHandler(
+            null, {allowNewProperty: true});
         this._indicators = new Set();
 
         this._patchAppIcons();

utils.js

@@ -412,8 +412,8 @@ export class VFuncInjectionsHandler extends BasicHandler {
  * and restored
  */
 export class PropertyInjectionsHandler extends BasicHandler {
-    constructor(params) {
-        super();
+    constructor(parentObject, params) {
+        super(parentObject);
         this._params = params;
     }