Add undo/redo keyboard shortcuts #462
Description
Is your feature request related to a problem? Please describe.
When adjusting the position or the size of the different layers, it would be nicer and faster if I could undo changes with keyboard shortcuts in case something goes wrong. Or, in the case that I liked a previous version of the token better.
Describe the solution you'd like
Add common shortcuts ctrl+z for undo (in windows), and ctrl+shift+z (or ctrl+y) for redo.
Equivalent shortcuts should be added for macos and linux as well.
Describe alternatives you've considered
Additional context