* Update date control padding.
* Collapse publish settings section when opening panes for available widgets or nav menus.
* Remove save and cog buttons in mobile preview only mode.
* Move definition of `wp.customize.previewedDevice` to `wp.customize.state('previewedDevice')` for centralization, maintaining old alias.
* Remove unused CSS because the section is inside form now.
Props sayedwp, westonruter.
See #39896.
Fixes#42027, #42199.
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