enhance: commit searching (#2711)

- `Ctrl+Shift+F` will toggle commit searching
- Focus the input box when the commit searching panel is visible

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Views/CommitSearchView.axaml.cs

@@ -1,5 +1,7 @@
+using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Input;
+using Avalonia.Threading;
 
 namespace SourceGit.Views
 {
@@ -10,6 +12,14 @@ public CommitSearchView()
             InitializeComponent();
         }
 
+        protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
+        {
+            base.OnPropertyChanged(change);
+
+            if (change.Property == IsVisibleProperty && IsVisible)
+                Dispatcher.UIThread.Post(() => TxtSearchCommitsBox.Focus(NavigationMethod.Directional), DispatcherPriority.Background);
+        }
+
         private void OnSearchBoxKeyDown(object _, KeyEventArgs e)
         {
             if (DataContext is not ViewModels.SearchCommitContext ctx)

src/Views/Launcher.axaml.cs

@@ -272,7 +272,7 @@ protected override async void OnKeyDown(KeyEventArgs e)
                             e.Handled = true;
                             return;
                         case Key.F when e.KeyModifiers.HasFlag(KeyModifiers.Shift):
-                            repo.Histories.IsSearchingCommits = true;
+                            repo.Histories.IsSearchingCommits = !repo.Histories.IsSearchingCommits;
                             e.Handled = true;
                             return;
                         case Key.B when e.KeyModifiers.HasFlag(KeyModifiers.Shift):