Do not block UI when restarting Steam

UWPHook/GamesWindow.xaml.cs

@@ -155,7 +155,8 @@ namespace UWPHook
 
             try
             {
-                await ExportGames(restartSteam);
+                await ExportGames();
+                await RestartSteam(restartSteam);
 
                 msg = "Your apps were successfuly exported!";
                 if(!restartSteam)
@@ -339,7 +340,7 @@ namespace UWPHook
         /// </summary>
         /// <param name="restartSteam"></param>
         /// <returns></returns>
-        private async Task<bool> ExportGames(bool restartSteam)
+        private async Task<bool> ExportGames()
         {
             string[] tags = Settings.Default.Tags.Split(',');
             string steam_folder = SteamManager.GetSteamFolder();
@@ -470,7 +471,10 @@ namespace UWPHook
                 }
             }
 
-            if(restartSteam)
+            return true;
+        }
+
+        private async Task<bool> RestartSteam(bool restartSteam)
         {
             Func<Process> getSteam = () => Process.GetProcessesByName("steam").SingleOrDefault();
 
@@ -489,9 +493,9 @@ namespace UWPHook
 
                 //give it N seconds to sort itself out
                 int waitSeconds = 8;
-                    while (watch.Elapsed.TotalSeconds < waitSeconds)
+                while (!restarted || watch.Elapsed.TotalSeconds < waitSeconds)
                 {
-                        Thread.Sleep(TimeSpan.FromSeconds(0.5f));
+                    await Task.Delay(TimeSpan.FromSeconds(0.5f));
                     if (getSteam() == null)
                     {
                         Debug.WriteLine("Restarting Steam");
@@ -512,7 +516,6 @@ namespace UWPHook
             {
                 Debug.WriteLine("Steam instance not found to be restarted");
             }
-            }
 
             return true;
         }