This affects the edit-mode copy/paste operators as well as the sculpt
mode _Clone_ tool. These copy and paste to/from the clipboard, but were
not applying the layer transform in the process. All curves were stored
in their respective local layer space. Since everything gets merged
these transforms get lost when storing to the clipboard.
Pasting curves from the clipboard was also not applying the target layer
transform. Also the clipboard content was getting pasted into every
editable drawing.
Now clipboard curves are always stored in world space. Pasting only
happens on the active layer, and the active layer inverse transform is
applied so visual transform of curves shouldn't change through copy and
paste.
Pull Request: https://projects.blender.org/blender/blender/pulls/127917
bf2f4e54cc