refactor: use Ctrl+Shift+S to save revision file

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

Author: love-linger

src/ViewModels/CommitDetail.cs

@@ -567,7 +567,7 @@ public ContextMenu CreateRevisionFileContextMenu(Models.Object file)
             saveAs.Header = App.Text("SaveAs");
             saveAs.Icon = App.CreateMenuIcon("Icons.Save");
             saveAs.IsEnabled = file.Type == Models.ObjectType.Blob;
-            saveAs.Tag = OperatingSystem.IsMacOS() ? "⌘+S" : "Ctrl+S";
+            saveAs.Tag = OperatingSystem.IsMacOS() ? "⌘+⇧+S" : "Ctrl+Shift+S";
             saveAs.Click += async (_, ev) =>
             {
                 await SaveRevisionFile(file);

src/Views/RevisionFileTreeView.axaml.cs

@@ -134,7 +134,7 @@ protected override async void OnKeyDown(KeyEventArgs e)
                 }
                 else if (node.Backend is { Type: Models.ObjectType.Blob } file &&
                     e.Key == Key.S &&
-                    e.KeyModifiers.HasFlag(OperatingSystem.IsMacOS() ? KeyModifiers.Meta : KeyModifiers.Control))
+                    e.KeyModifiers == ((OperatingSystem.IsMacOS() ? KeyModifiers.Meta : KeyModifiers.Control) | KeyModifiers.Shift))
                 {
                     var detailView = this.FindAncestorOfType<CommitDetail>();
                     if (detailView is { DataContext: ViewModels.CommitDetail detail })