Undo, should do just that, undo the last actions. It’s really quite simple.
Currently if you apply a change to 10 images, and then immediately activate undo, only one image is reverted…. And even worse, if you made a change to the color tag that you want to undo, and you select undo, the color tag stays and the last history item is reversed…
This is not at all “undo”…
It doesn’t work, and it should be fixed.