d589251905
This PR adds the "Separate" operator from GPv2. Changes: In GPv2 there were three modes: Selected Point, Selected Strokes and Active Layer. For better consistency with meshes Separate Operator, there are now three modes: - Selected (point or strokes is determined by mode selection) - By Layers (not only the active one) - By Materials (new) Also Multiframe selection is now supported. Pull Request: https://projects.blender.org/blender/blender/pulls/116715