Blender Git Commit Log

Partially fix T90593: Image ID wrongly seen as changed on undos.

Several pure runtime data in this ID type were not properly cleared by
write/read processes.

Note that the initial undo step (the one leading back to initial read
file state) is still forcing re-load of image, for some reasons.

Common investigation together with Jeroen Bakker (@jbakker), thanks. See
also D12242.