If true, the custom_icon key is used as a custom icon for the button. If false, the custom_icon key is ignored. This key is only relevant if the object_type key is "menu-object" or "drawer-object".
Hautatzen bada, custom_icon gakoa erabiliko da botoiaren ikono pertsonalizatu gisa. Bestela, custom_icon gakoari ez zaio jaramonik egingo. object_type gakoa "menu-object" edo "drawer-object" denean bakarrik erabiltzen da gako hau.