Relax the conditions for focus prevention

Now applies to windows in the application layer that don't have a
parent.

src/miral/minimal_window_manager.cpp

@@ -308,7 +308,6 @@ void miral::MinimalWindowManager::advise_new_window(miral::WindowInfo const& win
     // "application" layer that don't have a parent.
     auto in_background =
         (self->focus_stealing == FocusStealing::prevent) && tools.active_window() &&
-        (window_info.type() == mir_window_type_normal || window_info.type() == mir_window_type_freestyle) &&
         window_info.depth_layer() == mir_depth_layer_application && !window_info.parent();
 
     self->application_selector.advise_new_window(window_info, in_background);