enhance: auto-select the file after picking one from suggestion dropdown

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

Author: love-linger

src/Views/RevisionFileTreeView.axaml

@@ -8,7 +8,8 @@
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.RevisionFileTreeView"
              x:Name="ThisControl">
-  <v:RevisionFileRowsListBox ItemsSource="{Binding #ThisControl.Rows}"
+  <v:RevisionFileRowsListBox x:Name="RowsList"
+                             ItemsSource="{Binding #ThisControl.Rows}"
                              Background="Transparent"
                              SelectionMode="Single"
                              SelectionChanged="OnRowsSelectionChanged"

src/Views/RevisionFileTreeView.axaml.cs

@@ -325,6 +325,14 @@ public async Task SetSearchResultAsync(string file)
             }
 
             Rows.AddRange(rows);
+
+            if (_searchResult.Count > 0)
+            {
+                var lastNode = Rows[^1];
+                RowsList.SelectedItem = lastNode;
+                RowsList.ScrollIntoView(lastNode);
+            }
+
             GC.Collect();
         }