Andrea Fercia 17f53091ed Bump H3 headings to H2 on the Network Admin > Sites > Edit Site screens.
The navigation tabs appear in an `<h3>` heading immediately following the main `<h1>` and need to have a proper hierarchy.
Also, fix the tabs focus style and introduce a new `.nav-tab-small` CSS class.

Fixes #34079.
Built from https://develop.svn.wordpress.org/trunk@34913


git-svn-id: http://core.svn.wordpress.org/trunk@34878 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-10-07 17:35:24 +00:00
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2015-06-27 15:41:25 +00:00