[LYN-3137] Fixed EMFX floating dock widgets not responding to docking events.

Code/Framework/AzQtComponents/AzQtComponents/Components/FancyDocking.cpp

@@ -2298,6 +2298,12 @@ namespace AzQtComponents
             OptimizedSetParent(dock, mainWindow);
             mainWindow->addDockWidget(Qt::LeftDockWidgetArea, dock);
             dock->show();
+
+            // Make sure we listen for events on the dock widget being put into a floating dock window
+            // because this might be called programmatically, so the dock widget might have never been
+            // parented to our m_mainWindow initially, so it won't already have an event filter,
+            // which will prevent the docking functionality from working.
+            dock->installEventFilter(this);
         }
     }