If someone tries to localize 'jquery', which is now an alias with jquery-core and jquery-migrate dependencies, add the data to jquery-core.

fixes #24197.



git-svn-id: http://core.svn.wordpress.org/trunk@24635 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Revisions: remove some redundant code.

* Move some slider code into the slider view that was loitering in the checkmark view.
* `this.$()`, not `$()`.
* Cache a selector.
* `toggleClass()`, not `addClass()` with a ternary.
* Remove two classes with a single `removeClass()`.

See #24425.

git-svn-id: http://core.svn.wordpress.org/trunk@24636 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Grammar fix in Twenty Thirteen CSS comment. props SergeyBiryukov, fixes #24690.


git-svn-id: http://core.svn.wordpress.org/trunk@24637 1a063a9b-81f0-0310-95a4-ce76da25c4cd