Setting IsUsingGlobalSelection property

Author: StanleyGoldman

src/UnityExtension/Assets/Editor/GitHub.Unity/UI/ChangesView.cs

@@ -28,7 +28,7 @@ class ChangesView : Subview
         [SerializeField] private string currentBranch = "[unknown]";
 
         [SerializeField] private Vector2 treeScroll;
-        [SerializeField] private ChangesTree treeChanges = new ChangesTree { DisplayRootNode = false, IsCheckable = true };
+        [SerializeField] private ChangesTree treeChanges = new ChangesTree { DisplayRootNode = false, IsCheckable = true, IsUsingGlobalSelection = true };
 
         [SerializeField] private HashSet<string> gitLocks;
         [SerializeField] private List<GitStatusEntry> gitStatusEntries;