fc321739f0
#111972 made sure copied sockets have unique identifiers, but it didn't cover the case of copying a panel and its children. - Added an optional `uid_gen` argument to item copy functions which generates new unique identifiers for copied items. If not specified the items will retain the original identifiers (e.g. when copying an entire node tree). - Removed the `copy_items` panel function from the API. Only used internally and requires a uid generator now. Pull Request: https://projects.blender.org/blender/blender/pulls/112074