Add a way to "prepare" changes before they go live

[atomicptr]

Currently while you can create new items that can be associated to a patch and won't appear until you set that as LIVE, you can't really edit existing items

This could possibly be implemented with a sort of overlay data set that gets automatically applied when a patch is set to live (downside: No rollbacks)

Or: Have multiple versions of the same data set (although this would still have to run under the same ID for build templates)