Add undo/redo

[WVAviator]

Undo/redo should work as expected with all components. Note that typing text in PaintableText or Monaco already works with undo - intercepting these native events will need to be handled.

Undoing an image paste should send a delete request to S3 for that image

Undoing things like dragging, resizing or drawing should undo the whole event, not just the last minor change to the state. Will this require debouncing main state updates?