Issue #1015798 by oriol_e9g, Mohammed J. Razem, dimitriseng, xjm, mstrelan, drunken monkey: Fixed Fieldsets inside vertical tabs have no title and can't be collapsed.

#925350 by reglogge, Jacine, Jeff Burnz: Fixed Vertical tabs markup to restore RTL support and fix other bugs.

#467296 by Frank Ralf, mgifford, Everett Zufelt, Cliff,seutje, Bojhan, kat3_drx, et al: Accessibility improvements for vertical tabs.

#474242 by tic2000: Use more specific CSS selectors for Vertical Tabs to prevent breakage by other modules.

#473878 by tic2000: Fix vertical tabs styling which was accidentally mangled in content-region-as-a-block patch.

#323112 follow-up by kkaefer: Make tab titles enclosed in <strong> tags to indicate importance from surrounding text.

#323112 by dmitrig01, kkaefer, quicksketch, frando and many many more: Now presenting... Vertical Tabs. Fantastic new UI improvement for node forms and hopefully more in the future.