Fix notification window grab event

cutefish

@@ -1,2 +1,2 @@
 [General]
-Version=0.5.1
+Version=0.6

notificationd/notificationwindow.cpp

@@ -48,6 +48,9 @@ bool NotificationWindow::eventFilter(QObject *object, QEvent *event)
     } else if (event->type() == QEvent::Show) {
         KWindowSystem::setState(winId(), NET::SkipTaskbar | NET::SkipPager | NET::SkipSwitcher);
         HistoryModel::self()->updateTime();
+    } else if (event->type() == QEvent::Hide) {
+        setMouseGrabEnabled(false);
+        setKeyboardGrabEnabled(false);
     }
 
     return QObject::eventFilter(object, event);