Also includes these related changes:
* Export `oldContainer` and `newContainer` among the `customize-preview-menu-refreshed` event params for themes to be able to more easily re-initialize the DOM elements.
* Improve performance for partial refresh by only sending settings related to the menu being previewed.
* Fix previewing of menu assigned to Custom Menu by exporting a menu `term_id` as opposed to an object, as the former is more stable for comparing in in args hashes.
* Do full refresh of preview when nav menu unassigned so that the layout can be updated.
* Harden conditions for when partial refresh is eligible for a `wp_nav_menu()` instance.
Fixes#32841.
Built from https://develop.svn.wordpress.org/trunk@33138
git-svn-id: http://core.svn.wordpress.org/trunk@33109 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Defer the preview starting to listen to setting changes until after the Customizer has synced settings into the preview. This ensures that any differences between the JS and PHP representations of the settings won't cause an infinite refresh.
See #32911.
Fixes#32894.
Built from https://develop.svn.wordpress.org/trunk@33134
git-svn-id: http://core.svn.wordpress.org/trunk@33105 1a063a9b-81f0-0310-95a4-ce76da25c4cd