Remove focus when pressing esc

Author: yaira2

src/Files.App/UserControls/NavigationToolbar.xaml

@@ -325,6 +325,7 @@
 			CurrentSelectedModeName="{x:Bind ViewModel.OmnibarCurrentSelectedModeName, Mode=TwoWay}"
 			IsFocused="{x:Bind ViewModel.IsOmnibarFocused, Mode=TwoWay}"
 			LostFocus="Omnibar_LostFocus"
+			PreviewKeyDown="Omnibar_PreviewKeyDown"
 			QuerySubmitted="Omnibar_QuerySubmitted"
 			TextChanged="Omnibar_TextChanged">
 

src/Files.App/UserControls/NavigationToolbar.xaml.cs

@@ -406,5 +406,11 @@ private void Omnibar_LostFocus(object sender, RoutedEventArgs e)
 				ViewModel.OmnibarCommandPaletteModeText = string.Empty;
 			}
 		}
+
+		private void Omnibar_PreviewKeyDown(object sender, KeyRoutedEventArgs e)
+		{
+			if (e.Key is VirtualKey.Escape)
+				Omnibar.IsFocused = false;
+		}
 	}
 }