Windows: Add OriginHierarchyWindow

Elwig/Windows/ContextWindow.cs

@@ -24,14 +24,18 @@ namespace Elwig.Windows {
             Loaded += OnLoaded;
         }
 
-        private async void OnShouldRenewContext(object? sender, EventArgs evt) {
-            if (!Context.HasBackendChanged) return;
+        public async Task HintContextChange() {
             _renewPending = true;
             if (LockContext) return;
             await RenewContext();
         }
 
-        protected async void OnLoaded(object sender, RoutedEventArgs evt) {
+        private async void OnShouldRenewContext(object? sender, EventArgs? evt) {
+            if (!Context.HasBackendChanged) return;
+            await HintContextChange();
+        }
+
+        protected async void OnLoaded(object? sender, RoutedEventArgs? evt) {
             await OnRenewContext();
         }