Part of #59244
This was heavily requested since there are a lot of usages of
`operator_menu_enum` around in our UI [and these menus all cannot be
added to Quick Favorites atm.].
The following are just a small sample from the 3D viewport menus (object
mode), but there are many more.
- Object
-- Set Origin
-- Relations >> Make Local...
-- Convert To
- Add
-- Grease Pencil
-- Empty
-- Force Field
-- Collection Instance
- Select
-- Select All by Type
-- Select Grouped
-- Select Linked
- ...
So in order to make this work, `USER_MENU_TYPE_OPERATOR` /
`bUserMenuItem_Op` is reused (but extended with a string to the property
in question). (Alternatively, a new type could be introduced -- but
would share most of the code with the type that is reused in this
patch).
Depending on being used with an enum or not [detected by the usage of
that new string] we then either call `uiItemFullO_ptr` or
`uiItemMenuEnumFullO_ptr` in `screen_user_menu_draw`.
NOTE: we now also let `uiItemMenuEnumFullO_ptr` take an optional
`wmOperatorCallContext` (would always take the layouts root context
otherwise which is not what we always want for Quick Favorite menus).
NOTE: support for other enums (property enums such as pivot point or
transform orientations) will follow in a separate commit (building upon
6a13b6324b, trying to solve the way these draw as menus)
NOTE: opening User Preferences with such "new" Quick Favorites even
works (just not drawn with a menu)
Philipp Oeser