actually use isAncestor

Change-Id: I12180137a256c33d3e603238537c81a7059ba65f

src/scriptengines/qml/plasmoid/appletinterface.cpp

@@ -201,6 +201,7 @@ void AppletInterface::destroyedChanged(bool destroyed)
             candidate = candidate->parentItem();
         }
 
+        if (isAncestor) {
             //Found? remove focus for the whole hyerarchy
             candidate = focus;
 
@@ -209,6 +210,7 @@ void AppletInterface::destroyedChanged(bool destroyed)
                 candidate = candidate->parentItem();
             }
         }
+    }
 
     setVisible(!destroyed);
 }