Fixed unit tests by reverting a change to config.jso

Terminal.Gui/Resources/config.json

@@ -20,6 +20,7 @@
   "Application.AlternateBackwardKey": "Ctrl+PageUp",
   "Application.AlternateForwardKey": "Ctrl+PageDown",
   "Application.QuitKey": "Esc",
+  "Application.IsMouseDisabled": false,
   "Theme": "Default",
   "Themes": [
     {