Add workaround for delegate stuck transition bug

Sometimes and randomly, a HListView/HGridView delegate's
add/populate transition will stop before completion.

This especially happens on startup when loading a large room list,
one room might get stuck and left tiny or invisible, despite its
normal space still being taken.

src/gui/Pages/AccountSettings/DeviceDelegate.qml

@@ -173,4 +173,6 @@ HTile {
     }
 
     onLeftClicked: checkBox.clicked()
+
+    DelegateTransitionFixer {}
 }