enhance: do not wait for the cancel operation finished (the UI will auto wait for Sure complete)

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

Author: love-linger

src/ViewModels/Clone.cs

@@ -189,7 +189,8 @@ public override async Task<bool> Sure()
 
         public override void Terminate()
         {
-            _cancellation?.Cancel();
+            // Just fire cancel event and UI will auto wait the `Sure` complete
+            var _ = _cancellation?.CancelAsync();
         }
 
         private void CollectGroups(List<RepositoryNode> outs, List<RepositoryNode> collections)

src/ViewModels/Fetch.cs

@@ -124,7 +124,8 @@ public override async Task<bool> Sure()
 
         public override void Terminate()
         {
-            _cancellation?.Cancel();
+            // Just fire cancel event and UI will auto wait the `Sure` complete
+            var _ = _cancellation?.CancelAsync();
         }
 
         private readonly Repository _repo = null;

src/ViewModels/Pull.cs

@@ -183,7 +183,8 @@ public override async Task<bool> Sure()
 
         public override void Terminate()
         {
-            _cancellation?.Cancel();
+            // Just fire cancel event and UI will auto wait the `Sure` complete
+            var _ = _cancellation?.CancelAsync();
         }
 
         private void PostRemoteSelected()

src/ViewModels/Push.cs

@@ -226,7 +226,8 @@ public override async Task<bool> Sure()
 
         public override void Terminate()
         {
-            _cancellation?.Cancel();
+            // Just fire cancel event and UI will auto wait the `Sure` complete
+            var _ = _cancellation?.CancelAsync();
         }
 
         private void AutoSelectBranchByRemote()

src/ViewModels/PushRevision.cs

@@ -61,7 +61,8 @@ public override async Task<bool> Sure()
 
         public override void Terminate()
         {
-            _cancellation?.Cancel();
+            // Just fire cancel event and UI will auto wait the `Sure` complete
+            var _ = _cancellation?.CancelAsync();
         }
 
         private readonly Repository _repo;