No async when minimized (#10880)

Do not run git-ls-files by default when in minimized
to not interfere with restoring.
The setting was added in
cccfbc9
but required explicit configuration.

Co-authored-by: Gerhard Olsson <gerhardol@users.noreply.github.com>

GitCommands/Settings/AppSettings.cs

@@ -2042,7 +2042,7 @@ public static bool WorkaroundActivateFromMinimize
 
         public static bool GitAsyncWhenMinimized
         {
-            get => GetBool("GitAsyncWhenMinimized", true);
+            get => GetBool("GitAsyncWhenMinimized", false);
         }
 
         private static IEnumerable<(string name, string value)> GetSettingsFromRegistry()