KMessageWidget: hide messages regardless whether it's visible

Even if the message isn't visible hide it, don't just return.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/kmessagewidget.cpp

@@ -435,6 +435,7 @@ void KMessageWidget::animatedHide()
     }
 
     if (!isVisible()) {
+        hide();
         return;
     }