Another update about classes. This would still be a Gtk.ActionBar, but with "Gtk.STYLE_CLASS_INLINE_TOOLBAR" and a button with "Gtk.STYLE_CLASS_DESTRUCTIVE_ACTION"
Another update about classes. This would still be a Gtk.ActionBar, but with "Gtk.STYLE_ CLASS_INLINE_ TOOLBAR" and a button with "Gtk.STYLE_ CLASS_DESTRUCTI VE_ACTION"