Issue #488496 by loganfsmyth, Gábor Hojtsy: Implement missing msgctx context in JS translation for feature parity with t().

Issue #363354 by xjm, aspilicious, casey, Boobaa: Fixed Tableselect should only select enabled checkboxes.

Issue #879580 by arithmetric: Fixed States fail when using integer values for select/radio dependencies.

- Patch #1116416 by Kars-T, Coornail: use 'Header set' instead of 'Header append' in .htaccess to avoid double encoding.

Issue #303189 by Darren Oh, fietserwin, q0rban, bdragon, osopolar, dboulet, Peter Törnstrand: Fixed Tabledrag doesn't hide columns when the whole table is initially hidden.

Issue #634616 by effulgentsia, rfay, sun: Fixed Various problems due to AJAX binding to mousedown instead of click.

Issue #908282 by jbrown, pillarsdotnet: add width and height attributes to increase front-end performance.

#1003828 by rfay: Fixed Drupal.ajaxError may itself throw an exception, causing silent 'AJAX Error 0' events

#995854 by rfay, effulgentsia, sun, merlinofchaos, Damien Tournoud, manimejia: Fixed #ajax doesn't work at all if a file element (or enctype => 'multipart/form-data')  is included in the form

- Patch #976758 by pwolanin, sun: existing machine names are changed when human readable name is changed (e.g. node type, vocabulary).

#939568 by merlinofchaos, sun: Enable finer control for ajax-using modules of the trigger response in the ajax object.

#969346 by merlinofchaos, sun: Fixed CTools AJAX regression: AJAX calls made with things that are not forms cannot use the throbber.

- Patch #565808 by cha0s, thegreat, Dave Reid, Alexander N, andrewlevine, carlos8f: nojs/ajax replacement.