Revert "Issue #1742438 by larowlan, Christian Biggins, kim.pepper, dcam, Everett Zufelt, mgifford: Fixed Vertical tabs header and container rendered even when no vertical tabs."

Concerns raised in http://drupal.org/node/1742438#comment-6609888 that this breaks backwards compatibility.

This reverts commit d462cafd.

Issue #1263302 by andypost, peterpoe: Fixed States API disabled state handler filters out nonexistent class 'form-element'.

Issue #1622974 by xjm, iflista, brianV: Fixed Aggregator fails to parse author entries longer than 255 characters.

Issue #1742602 by dcam, Lars Toomre, xjm, lazysoundsystem: Remove t() from assert messages in comment module tests

Issue #1742438 by larowlan, Christian Biggins, kim.pepper, dcam, Everett Zufelt, mgifford: Fixed Vertical tabs header and container rendered even when no vertical tabs.

Issue #218004 by Dave Reid, heyrocker, pcambra, neclimdul, alex_b, cam8001, twistor, mfb, catch, xjm, beeradb: Fixed Allow aggregator feed URLs longer than 255 characters.

Issue #1677830 by slashrsm: Improve docs for user and node hooks in regards to database transactions

Issue #1067120 by BTMash, DamienMcKenna, corvus_ch, valthebald, mrfelton, fgm, Dave Reid: Fixed Missing hook_taxonomy_term_view() or hook_entity_view() when viewing a term.

Issue #1038932 by tim.plunkett, Chris Gillis: Theme_image_formatter() assumes that title, alt, and options are always set.

Issue #1780012 by dewens: Fixed "parameter 1 expected to be a reference" error in Profile module's hook_user_cancel() implementation.

Issue #1037632 by Sheldon Rampton, Tor Arne Thune, roy smith: Fixed Attaching a forbidden file to a node gives an error message with bogus file path.

Issue #1057912 by bfroehle, mgifford, bowersox, tarekdj, geerlingguy, hgurol: Fixed Weird Border on Vertical Tabs with Google Chrome and Safari caused by .element-invisible.

Issue #1802844 by antojose: Fixed 'have to' repeated twice as 'have to have to' in the comment for the function hook_module_implements_alter() in system.api.php.

Issue #1154382 by Berdir, barraponto, acouch, swentel, LoMo, DamienMcKenna, chx: Fixed View mode no longer can be changed.

Issue #1575790 by greg.1.anderson, sun, tim.plunkett, superhenne: Fixed Update #7002 fails on postgres - ILIKE operator on bytea not supported.

Issue #932110 by Albert Volkman, David_Rothstein, marji, jurgenhaas, dcam: On some servers, the Update Manager allows administrators to directly execute arbitrary code even without the PHP module. (Documentation fix)