Disable undo and redo toolbar buttons depending on history

The undo and redo buttons are currently always enabled when present in the toolbar, even when there is no history.
Would it be a feature to listen to changes and enable/disable the buttons depending on the history?

https://user-images.githubusercontent.com/935529/213391633-e48ac603-7d28-4f59-878d-90bc966f2463.mov

Demo:
https://codepen.io/snap/pen/dyjRRwr?editors=1010

Reproduce the toolbar behavior shown in the linked video and CodePen demo, then trace how the editor exposes undo and redo history changes. The work is done when each toolbar button is disabled when its corresponding history is empty and enabled when that action is available.

Written by the indexing model from the issue text.