Issue #1360790 by KrisBulman, beltofte, stBorchert: Update CSS to use lowercase hex colors not uppercase

This reverts commit 9bda29ee.

Issue #988930 by davidwhthomas, jyve, tim.plunkett, effulgentsia, droplet, nod_ | mariusz.slonina: Fixed Sticky table headers need to react properly to 'show/hide weights column' link.

Issue #1074672 by claudiu.cristea, mikewink: Added Allow language select to be rearranged inside node form.

Issue #87994 by Rob Loach, Jody Lynn, sun, dropcube, gordon, David_Rothstein, moshe weitzman, aspilicious, quicksketch | piersonr: Fixed Quit clobbering people's work when they click the filter tips link.

This reverts commit a7f72e66.

This reverts commit 9bd7daa8.

Revert "Issue #1272840 follow-up by Dave Reid: Fixed broken upgrade path for language domains and validation."

This reverts commit 91d6b144.

Issue #1272840 follow-up by Dave Reid: Fixed broken upgrade path for language domains and validation.

Issue #404302 by KrisBulman, kathyh, JamesAn, droplet, sun: Fixed Improve tabledrag grippie CSS (and fix an IE7 alignment issue).

Issue #1425330 by swentel, grendzy, davereid, wojtha, c960657: Fixed Apply Aggregator and OpenID fixes from DRUPAL-SA-CORE-2012-001.

Revert "Issue #1425330 by swentel, grendzy, davereid, wojtha, c960657: Fixed Apply Aggregator and OpenID fixes from DRUPAL-SA-CORE-2012-001."

This reverts commit c3fa160d.

Issue #1425330 by swentel, grendzy, davereid, wojtha, c960657: Fixed Apply Aggregator and OpenID fixes from DRUPAL-SA-CORE-2012-001.

Issue #1446372 by Heine, bserem, champlin: Fixed Invalid Unicode code range in PREG_CLASS_UNICODE_WORD_BOUNDARY fails with PCRE 8.30.

Issue #218004 by Dave Reid, heyrocker, pcambra, neclimdul et al: Fixed Allow aggregator feed URLs longer than 255 characters.

Issue #1430300 by mradcliffe, effulgentsia: Fixed Preprocess functions in an include file fail to get called when the theme implements a suggestion override.

Issue #967166 by effulgentsia, Cottser: Fixed Content rendered via AJAX does not respect stylesheets removed in .info files.

Issue #1065626 by Heine, droplet, xjm: Fixed Machine name not editable if every character is replaced.

Issue #687180 by Island Usurper, catch, Berdir, Damien Tournoud, xjm: Fixed Deleting a taxonomy vocabulary leaves term reference fields still pointing to it, and a PDO Exception when creating content.

- Patch #673020 by Zoltán Balogh, Gábor Hojtsy, good_man, kalman.hosszu: tests for adding the Content-Language HTTP header to the generated page.

- Patch #1410096 by fastangel, Gábor Hojtsy, kalman.hosszu: convert comment language code schema to langcode.

- Patch #1416392 by Gábor Hojtsy, plach, rvilar: clean up language (types) bootstrap function naming and documentation.