Sets the `GMenuModel` from which the popup will be constructed.
If menu_model is null, the button is disabled.
A [[email protected]] will be created from the menu model with [[email protected]_from_model]. Actions will be connected as documented for this function.
If [[email protected]:popover] is already set, it will be dissociated from the this, and the property is set to null.
| this |
a `GtkMenuButton` |
| menu_model |
a `GMenuModel`, or null to unset and disable the button |