Problem/Motivation
One of the most awesome benefits of adding vertical tabs in Drupal 7 was the javascript that allowed people to see what the current values were without having to pop-open the fieldsets. This benefit has been lost by moving the tabs to the right hand column.
I did a little research into the development of this new display of vertical tabs, and it looks like the current values are supposed to be present - at least according to the screenshots shown in this issue - the one that got committed.
Perhaps they were forgotten, or removed later for some other reason?
Proposed resolution
Put back the awesomeness that was vertical tabs - javascript revealing current values from within fieldsets. In Drupal 7.38 it's handled in /misc/collapse.js, line 56-101, propably doesn't work one-by-one to D8.
Remaining tasks
see above
User interface changes
see above
API changes
none
Related Issues
#1936700: Book module usability: Stop using vertical tabs
