refactor<*>: rewrite all with AvaloniaUI

src/ViewModels/PruneRemote.cs

@@ -0,0 +1,28 @@
+using System.Threading.Tasks;
+
+namespace SourceGit.ViewModels {
+    public class PruneRemote : Popup {
+        public Models.Remote Remote {
+            get;
+            private set;
+        }
+
+        public PruneRemote(Repository repo, Models.Remote remote) {
+            _repo = repo;
+            Remote = remote;
+            View = new Views.PruneRemote() { DataContext = this };
+        }
+
+        public override Task<bool> Sure() {
+            _repo.SetWatcherEnabled(false);
+            return Task.Run(() => {
+                SetProgressDescription("Run `prune` on remote ...");
+                var succ = new Commands.Remote(_repo.FullPath).Prune(Remote.Name);
+                CallUIThread(() => _repo.SetWatcherEnabled(true));
+                return succ;
+            });
+        }
+
+        private Repository _repo = null;
+    }
+}