Problem/Motivation
From #2905922-61: Implementation issue for Layout Builder:
- Does a layout in progress go into a tempstore like Views? Seems like the kind of thing where it would really suck to lose your work when leaving the page. I couldn't tell whether it did or not when playing with it.
- On that note, would be good to have a message like "You have unsaved changes" like Views does. Otherwise I can get lost in the page and not know if I actually changed something or not.
- IANAD (I am not a designer) but it seems like it would be good to have visual feedback on when a layout is saved or not.