Fixed a flickering issue

Author: 0x5bfa

src/Files.App.Controls/Omnibar/Omnibar.cs

@@ -149,10 +149,11 @@ private void Omnibar_GotFocus(object sender, RoutedEventArgs e)
 
 		private void Omnibar_LostFocus(object sender, RoutedEventArgs e)
 		{
-			// Ignore when user clicks on the TextBox or OmnibarMode's button area, Omnibar still has focus
+			// Ignore when user clicks on the TextBox or the button area of an OmnibarMode, Omnibar still has focus anyway
 			if (e.OriginalSource.GetType() is not { } originalSourceType ||
 				originalSourceType == typeof(TextBox) ||
-				originalSourceType == typeof(OmnibarMode))
+				originalSourceType == typeof(OmnibarMode) ||
+				originalSourceType == typeof(Omnibar))
 				return;
 
 			_isFocused = false;