action_bar_layer_set_background_color not working as intended

[Stubenhocker1399]

When setting the background of an action bar layer on window load, the background stays white.

However, one can see the background flashing to the set color when starting the app using it (see the current "settings" app test, before the transition animation it appears on the right.

So maybe it is not a problem with action_bar_layer_set_background_color, but rather the drawing itself.