Window: keyPressEvent: don't show empty shortcuts

window.cpp

@@ -380,9 +380,12 @@ void Window::keyPressEvent(QKeyEvent *event)
 		}
 
 		for(EntryPushButton *button : buttonsInGrid)
+		{
+			if(!button->getEntryConfig().key.isEmpty())
 			{
 				button->showShortcut();
 			}
+		}
 
 		QKeySequence seq(event->key());
 		QString key = seq.toString().toLower();