* Added the option to set hide on item selection. Usable in GDScript and from within the source code when you want to specify popup menus you don't want to close immediately when selecting an item
* Renamed getter from get_ to is_, fixed parent/child behavior, renamed bool variable to match most code and added ADD_PROPERTYNO to save some memory
(cherry picked from commit da950cd0f2)
0701e7c2d8