Fix lobbyView ready behavior on tskChange

Projekte/mdga/client/src/main/java/pp/mdga/client/view/LobbyView.java

@@ -231,6 +231,10 @@ private void toggleTsk(Color color) {
                 break;
         }
 
+        if(isReady) {
+            setReady(own, false);
+        }
+
         switch (taken) {
             case NOT:
                 app.getModelSynchronize().selectTsk(color);