Fix the caret position : Dispatch the caret move with a lower priority so the QueryTextBox has the new value when the code is executed

Flow.Launcher/MainWindow.xaml.cs

@@ -538,7 +538,9 @@ namespace Flow.Launcher
 
         private void MoveQueryTextToEnd()
         {
-            Dispatcher.Invoke(() => QueryTextBox.CaretIndex = QueryTextBox.Text.Length);
+            // QueryTextBox seems to be update with a DispatcherPriority as low as ContextIdle.
+            // To ensure QueryTextBox is up to date with QueryText from the View, we need to Dispatch with such a priority
+            Dispatcher.Invoke(() => QueryTextBox.CaretIndex = QueryTextBox.Text.Length, System.Windows.Threading.DispatcherPriority.ContextIdle);
         }
 
         public void InitializeColorScheme()