Await close event from non-ui thread

Author: Jack251970

Flow.Launcher.Core/ProgressBoxEx.xaml.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Input;
 using Flow.Launcher.Infrastructure.Logger;
@@ -64,13 +65,18 @@ public void ReportProgress(double progress)
             }
         }
 
-        private new void Close()
+        public async Task CloseAsync()
         {
             if (!Application.Current.Dispatcher.CheckAccess())
             {
-                Application.Current.Dispatcher.Invoke(Close);
+                await Application.Current.Dispatcher.InvokeAsync(Close);
             }
 
+            Close();
+        }
+
+        private new void Close()
+        {
             if (_isClosed)
             {
                 return;

Flow.Launcher.Plugin/IProgressBoxEx.cs

@@ -1,4 +1,6 @@
-namespace Flow.Launcher.Plugin;
+using System.Threading.Tasks;
+
+namespace Flow.Launcher.Plugin;
 
 /// <summary>
 /// Interface for progress box
@@ -16,5 +18,5 @@ public interface IProgressBoxEx
     /// <summary>
     /// Close progress box.
     /// </summary>
-    public void Close();
+    public Task CloseAsync();
 }

Plugins/Flow.Launcher.Plugin.PluginsManager/PluginsManager.cs

@@ -196,7 +196,7 @@ internal async Task InstallOrUpdateAsync(UserPlugin plugin)
                         if (downloadCancelled)
                             return;
                         else
-                            prgBox?.Close();
+                            await prgBox?.CloseAsync();
                     }
                     else
                     {
@@ -217,7 +217,7 @@ internal async Task InstallOrUpdateAsync(UserPlugin plugin)
             catch (HttpRequestException e)
             {
                 // force close progress box
-                prgBox?.Close();
+                await prgBox?.CloseAsync();
 
                 // show error message
                 Context.API.ShowMsgError(
@@ -230,7 +230,7 @@ internal async Task InstallOrUpdateAsync(UserPlugin plugin)
             catch (Exception e)
             {
                 // force close progress box
-                prgBox?.Close();
+                await prgBox?.CloseAsync();
 
                 // show error message
                 Context.API.ShowMsgError(Context.API.GetTranslation("plugin_pluginsmanager_install_error_title"),