Fix T96163: Image editor doesn't refresh when undo/redo.

Undo would invalidate image owned GPU textures only. Textures
that are owned by the editor were not refreshed. This patch would
invalidate all the GPU textures by marking the whole image dirty.

This can be improved later as we could add partial updates of GPU
textures.

Reviewed By: mont29

Maniphest Tasks: T96163

Differential Revision: https://developer.blender.org/D14259

source/blender/editors/space_image/image_undo.c

@@ -570,7 +570,8 @@ static void uhandle_restore_list(ListBase *undo_handles, bool use_init)
 
     if (changed) {
       BKE_image_mark_dirty(image, ibuf);
-      BKE_image_free_gputextures(image); /* force OpenGL reload */
+      /* TODO(jbakker): only mark areas that are actually updated to improve performance. */
+      BKE_image_partial_update_mark_full_update(image);
 
       if (ibuf->rect_float) {
         ibuf->userflags |= IB_RECT_INVALID; /* force recreate of char rect */