Add Undo / Redo support to Animation Library Editing

[Arnklit]

Describe the project you are working on

A game in production

Describe the problem or limitation you are having in your project

When editing animation libraries it is easy to make a mistake and loose work due to it not supporting undo redo.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

Implement undo / redo in the Animation Library

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

You should be able to undo deleting / creating / renaming / copying animations in the "Edit Animations Libraries" view.

If this enhancement will not be used often, can it be worked around with a few lines of script?

Undo / Redo missing cannot be worked around with a script

Is there a reason why this should be core and not an add-on in the asset library?

This is about improving the editor workflow out of the box

[AThousandShips]

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

Please fill this in in more detail, what options are we talking about and how would this work?

[Arnklit]

Please fill this in in more detail, what options are we talking about and how would this work?

Sorry. Good point. I added a basic description, but maybe this would make more sense as a Discussion issue.

[AThousandShips]

Generally proposals should have some basic description or idea of how to do it as well as what to do, but this might be sufficient

[akien-mga]

There is UndoRedo code in AnimationLibraryEditor, so this might be a bug more than a missing feature.
CC @KoBeWi

[KoBeWi]

Yes, the code exists, and it's functional, but the undo/redo shortcuts don't work while the dialog is open. You need to close it first 🙃