fix #497, fix crash on startup

--this was crashing Latte on startup because
the WindowsModel was loaded too early when
the user had set "Show Background only for
maximized windows"

containment/package/contents/ui/WindowsModel.qml

@@ -49,7 +49,7 @@ Item{
 
         Component.onCompleted: {
             windowsRepeater.model = tasksModel;
-            winModel.reconsiderMaximized();
+           // winModel.reconsiderMaximized();
         }
     }
 

containment/package/contents/ui/main.qml

@@ -1150,7 +1150,7 @@ DragDrop.DropArea {
     }
 
     Loader{
-        active: Qt.application.arguments.indexOf("--with-window") >= 0
+        active: root.debugMode
         sourceComponent: DebugWindow{}
     }
 
@@ -1168,7 +1168,7 @@ DragDrop.DropArea {
     Loader{
         id: windowsModel
 
-        active: plasmoid.configuration.backgroundOnlyOnMaximized || root.disablePanelShadowMaximized
+        active: (plasmoid.configuration.backgroundOnlyOnMaximized || root.disablePanelShadowMaximized) && dock
 
         property bool hasMaximizedWindow: active && item ? item.maximizedWindowOnScreen : false
         sourceComponent: WindowsModel{}