enhance: only create squash menu item if it is needed

* update English translation
* re-order the menu items

src/Resources/Locales/en_US.axaml

@@ -102,7 +102,7 @@
   <x:String x:Key="Text.Clone.RemoteURL" xml:space="preserve">Repository URL:</x:String>
   <x:String x:Key="Text.Close" xml:space="preserve">CLOSE</x:String>
   <x:String x:Key="Text.CodeEditor" xml:space="preserve">Editor</x:String>
-  <x:String x:Key="Text.CommitCM.CherryPick" xml:space="preserve">Cherry-Pick This Commit</x:String>
+  <x:String x:Key="Text.CommitCM.CherryPick" xml:space="preserve">Cherry-Pick Commit</x:String>
   <x:String x:Key="Text.CommitCM.CherryPickMultiple" xml:space="preserve">Cherry-Pick ...</x:String>
   <x:String x:Key="Text.CommitCM.Checkout" xml:space="preserve">Checkout Commit</x:String>
   <x:String x:Key="Text.CommitCM.CompareWithHead" xml:space="preserve">Compare with HEAD</x:String>
@@ -110,16 +110,16 @@
   <x:String x:Key="Text.CommitCM.CopyInfo" xml:space="preserve">Copy Info</x:String>
   <x:String x:Key="Text.CommitCM.CopySHA" xml:space="preserve">Copy SHA</x:String>
   <x:String x:Key="Text.CommitCM.CustomAction" xml:space="preserve">Custom Action</x:String>
-  <x:String x:Key="Text.CommitCM.InteractiveRebase" xml:space="preserve">Interactive Rebase ${0}$ to Here</x:String>
+  <x:String x:Key="Text.CommitCM.InteractiveRebase" xml:space="preserve">Interactively Rebase ${0}$ on Here</x:String>
   <x:String x:Key="Text.CommitCM.Merge" xml:space="preserve">Merge to ${0}$</x:String>
   <x:String x:Key="Text.CommitCM.MergeMultiple" xml:space="preserve">Merge ...</x:String>
-  <x:String x:Key="Text.CommitCM.Rebase" xml:space="preserve">Rebase ${0}$ to Here</x:String>
+  <x:String x:Key="Text.CommitCM.Rebase" xml:space="preserve">Rebase ${0}$ on Here</x:String>
   <x:String x:Key="Text.CommitCM.Reset" xml:space="preserve">Reset ${0}$ to Here</x:String>
   <x:String x:Key="Text.CommitCM.Revert" xml:space="preserve">Revert Commit</x:String>
   <x:String x:Key="Text.CommitCM.Reword" xml:space="preserve">Reword</x:String>
   <x:String x:Key="Text.CommitCM.SaveAsPatch" xml:space="preserve">Save as Patch...</x:String>
   <x:String x:Key="Text.CommitCM.Squash" xml:space="preserve">Squash into Parent</x:String>
-  <x:String x:Key="Text.CommitCM.SquashCommitsSinceThis" xml:space="preserve">Squash Child Commits to Here</x:String>
+  <x:String x:Key="Text.CommitCM.SquashCommitsSinceThis" xml:space="preserve">Squash Children into Here</x:String>
   <x:String x:Key="Text.CommitDetail.Changes" xml:space="preserve">CHANGES</x:String>
   <x:String x:Key="Text.CommitDetail.Changes.Search" xml:space="preserve">Search Changes...</x:String>
   <x:String x:Key="Text.CommitDetail.Files" xml:space="preserve">FILES</x:String>

src/ViewModels/Histories.cs

@@ -407,10 +407,11 @@ namespace SourceGit.ViewModels
                 };
                 menu.Items.Add(reset);
 
+                if (commit.IsMerged)
+                {
                     var squash = new MenuItem();
                     squash.Header = App.Text("CommitCM.SquashCommitsSinceThis");
                     squash.Icon = App.CreateMenuIcon("Icons.SquashIntoParent");
-                squash.IsVisible = commit.IsMerged;
                     squash.Click += (_, e) =>
                     {
                         if (_repo.LocalChangesCount > 0)
@@ -426,6 +427,7 @@ namespace SourceGit.ViewModels
                     };
                     menu.Items.Add(squash);
                 }
+            }
             else
             {
                 var reword = new MenuItem();
@@ -482,6 +484,21 @@ namespace SourceGit.ViewModels
                 };
                 menu.Items.Add(rebase);
 
+                if (!commit.HasDecorators)
+                {
+                    var merge = new MenuItem();
+                    merge.Header = new Views.NameHighlightedTextBlock("CommitCM.Merge", current.Name);
+                    merge.Icon = App.CreateMenuIcon("Icons.Merge");
+                    merge.Click += (_, e) =>
+                    {
+                        if (PopupHost.CanCreatePopup())
+                            PopupHost.ShowPopup(new Merge(_repo, commit, current.Name));
+
+                        e.Handled = true;
+                    };
+                    menu.Items.Add(merge);
+                }
+
                 var cherryPick = new MenuItem();
                 cherryPick.Header = App.Text("CommitCM.CherryPick");
                 cherryPick.Icon = App.CreateMenuIcon("Icons.CherryPick");
@@ -513,21 +530,6 @@ namespace SourceGit.ViewModels
                     e.Handled = true;
                 };
                 menu.Items.Add(cherryPick);
-
-                if (!commit.HasDecorators)
-                {
-                    var merge = new MenuItem();
-                    merge.Header = new Views.NameHighlightedTextBlock("CommitCM.Merge", current.Name);
-                    merge.Icon = App.CreateMenuIcon("Icons.Merge");
-                    merge.Click += (_, e) =>
-                    {
-                        if (PopupHost.CanCreatePopup())
-                            PopupHost.ShowPopup(new Merge(_repo, commit, current.Name));
-
-                        e.Handled = true;
-                    };
-                    menu.Items.Add(merge);
-                }
             }
             else
             {
@@ -541,27 +543,6 @@ namespace SourceGit.ViewModels
                     e.Handled = true;
                 };
                 menu.Items.Add(revert);
-
-                var interactiveRebase = new MenuItem();
-                interactiveRebase.Header = new Views.NameHighlightedTextBlock("CommitCM.InteractiveRebase", current.Name);
-                interactiveRebase.Icon = App.CreateMenuIcon("Icons.InteractiveRebase");
-                interactiveRebase.IsVisible = current.Head != commit.SHA;
-                interactiveRebase.Click += (_, e) =>
-                {
-                    if (_repo.LocalChangesCount > 0)
-                    {
-                        App.RaiseException(_repo.FullPath, "You have local changes. Please run stash or discard first.");
-                        return;
-                    }
-
-                    App.OpenDialog(new Views.InteractiveRebase()
-                    {
-                        DataContext = new InteractiveRebase(_repo, current, commit)
-                    });
-
-                    e.Handled = true;
-                };
-                menu.Items.Add(interactiveRebase);
             }
 
             if (current.Head != commit.SHA)
@@ -580,6 +561,30 @@ namespace SourceGit.ViewModels
 
             menu.Items.Add(new MenuItem() { Header = "-" });
 
+            if (commit.IsMerged && current.Head != commit.SHA)
+            {
+                var interactiveRebase = new MenuItem();
+                interactiveRebase.Header = new Views.NameHighlightedTextBlock("CommitCM.InteractiveRebase", current.Name);
+                interactiveRebase.Icon = App.CreateMenuIcon("Icons.InteractiveRebase");
+                interactiveRebase.Click += (_, e) =>
+                {
+                    if (_repo.LocalChangesCount > 0)
+                    {
+                        App.RaiseException(_repo.FullPath, "You have local changes. Please run stash or discard first.");
+                        return;
+                    }
+
+                    App.OpenDialog(new Views.InteractiveRebase()
+                    {
+                        DataContext = new InteractiveRebase(_repo, current, commit)
+                    });
+
+                    e.Handled = true;
+                };
+                menu.Items.Add(interactiveRebase);
+                menu.Items.Add(new MenuItem() { Header = "-" });
+            }
+
             if (current.Head != commit.SHA)
             {
                 var compareWithHead = new MenuItem();