Mostly just the result of running `blender_icons_update.py` without adding or changing any icon source files. Removal of three unused icons and adding three others to the project to resolve conflicts between them.
Pull Request: https://projects.blender.org/blender/blender/pulls/114874
This adds the icon intended for Grease Pencil layer data, in SVG but currently marked as blank
Differential Revision: https://developer.blender.org/D5073