item should have an image
Action.setAlwaysShowImage
void setAlwaysShowImage(bool alwaysShow)Sets whether action's menu item proxies will ignore the #GtkSettings:gtk-menu-images setting and always show their image, if available.
Use this if the menu item would be useless or hard to use without their image.
Parameters
alwaysShow | true if menuitem proxies should always show their image |
Deprecated
Use [gio.menu_item.MenuItem.setIcon] on a #GMenuItem instead, if the