Issue comes from the fact that some of the image updates are handled
outside of depsgraph context (through the signal system), and therefore
completely ignored by the undo/redo code.
Now that undo/redo tries to update as little data as possible, it needs
to be aware of these changes.
As a temporary workaround, until image update is fully handled through depsgraph,
consider that IDs tagged with `ID_RECALC_SOURCE` should get their caches
cleared on undo/redo, and tag some RNA property updates of
Image/ColorSpace as such.
Reviewed By: sergey
Maniphest Tasks: T103242
Differential Revision: https://developer.blender.org/D16927
fc9c39e320