Ability to undo the last change/changes made to an entry which isn't a change that can currently be reverted with cmd z

[adam-webdna]

A client has requested the ability to undo a change or changes to an entry such as removing a block thats just been added, or reverting an image back, changing colours, etc.

As a craft CMS user, I would like to have an undo function so that I can go back a step in my editing and not have to redo the previous configuration or exit out of the page and start again from scratch.

Currently while writing content in a module, you can click ctrl-z to undo the last text written, but there’s no where else you can go back a step.

This would include adding a module, removing a module, changing a background colour etc

Is there any plugins that already do this, or could it be added into core Craft functionality?