89ed6b1293
- Use WM_operatortype_description to get the operator description. - Pass properties to WM_operatortype_name, so the operator name callback is used. - Add UI_but_operatortype_get_from_enum_menu function to access the operator from enum menus. - Change WM_operatortype_description to return NULL when there is no description, use WM_operatortype_description_or_name when either can be used.