Improve/introduce Customizer JavaScript models for Controls, Sections, and Panels.
* Introduce models for panels and sections.
* Introduce API to expand and focus a control, section or panel.
* Allow deep-linking to panels, sections, and controls inside of the Customizer.
* Clean up `accordion.js`, removing all Customizer-specific logic.
* Add initial unit tests for `wp.customize.Class` in `customize-base.js`.
https://make.wordpress.org/core/2014/10/27/toward-a-complete-javascript-api-for-the-customizer/ provides an overview of how to use the JavaScript API.
props westonruter, celloexpressions, ryankienstra.
see #28032, #28579, #28580, #28650, #28709, #29758.
fixes #29529.
Built from https://develop.svn.wordpress.org/trunk@30102
git-svn-id: http://core.svn.wordpress.org/trunk@30102 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2014-10-29 18:51:22 -04:00
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