[AppLauncher] Add max&min drag areas

src/qml/LauncherItemWrapper.qml

@@ -49,6 +49,10 @@ MouseArea {
     transformOrigin: Item.Center
     onXChanged: moved()
     onYChanged: moved()
+    drag.minimumX: parentItem.contentItem.x - width/2
+    drag.maximumX: parentItem.contentItem.width + width/2
+    drag.minimumY: parentItem.contentItem.y -height/2
+    drag.maximumY: parentItem.contentItem.height +height/2
 
     onClicked: {
         // TODO: disallow if close mode enabled