fix: OnNodesSelectionChanged event should not be disabled while auto-selecting current branch (#1022)

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

Author: love-linger

src/Views/BranchTree.axaml.cs

@@ -246,16 +246,11 @@ public void Select(Models.Branch branch)
             if (branch == null)
                 return;
 
-            _disableSelectionChangingEvent = true;
-
             var treePath = new List<ViewModels.BranchTreeNode>();
             FindTreePath(treePath, Nodes, branch.Name, 0);
 
             if (treePath.Count == 0)
-            {
-                _disableSelectionChangingEvent = false;
                 return;
-            }
 
             var oldRowCount = Rows.Count;
             var rows = Rows;
@@ -276,7 +271,6 @@ public void Select(Models.Branch branch)
             var target = treePath[treePath.Count - 1];
             BranchesPresenter.SelectedItem = target;
             BranchesPresenter.ScrollIntoView(target);
-            _disableSelectionChangingEvent = false;
 
             if (oldRowCount != rows.Count)
                 RaiseEvent(new RoutedEventArgs(RowsChangedEvent));