Undo DefaultResourcePage

[joepio]

Having a functioning undo would be very valuable. How should it work, technically?

Set previous version to current one

• Simple to build
• Works in most scenarios
• Doesn't work when editing a paragraph inside a resource, or a cell inside a table.

Create a log of "invertedActions"

• Store previous states of resources
• When undo, create a set with all the state of a previous one

[Polleps]

Tables already have an undo feature. using the 'Inverted actions' approach. I don't think it'll be to hard to adapt to other usecases but it won't be a catch all solution. There are a lot of UX problems with app wide undo so doing it on a per feature basis is probably better.

[joepio]

Perhaps add one for DefaultResourcePage