Toggle between snapshot and live mode

[lgedeon]

Instead of presenting two buttons one of which (publish) could have disastrous results on a live site, could we instead have a toggle that let's you switch between snapshot and live mode?

We could default to snapshot mode which would have a schedule option and even a button for opening a previous snapshot to continue work.

If you switch to live mode, then the publish button replaces the save button. This would make it more obvious to a user that "Oh, if I click publish now, this change is going live!"

This also gives a visual cue that you are in snapshot mode which will provide some peace of mind which, based recent user testing, would be really helpful.

[westonruter]

This would be closely related to xwp/wp-customize-posts#207

If we could collapse-down having two separate Save & Publish buttons to instead just have one button that would help. This could also tie into the scheduling UI (#68) and how really this is all about managing the snapshot post's post_status (👈) . There could be a post stats dropdown to switch between draft, pending, publish and future in some way.