Andrea Fercia 9c360b1ab8 Administration: Fix minor misalignments caused by the button-link CSS class.
After [40059] the CSS class `button-link` uses `text-align: left` by default.
This change now requires to limit as much as possible the use of `button-link`
to controls that should really look like links and to explicitly set
`text-align: center` in a few other cases.

Fixes #39983.

Built from https://develop.svn.wordpress.org/trunk@40358


git-svn-id: http://core.svn.wordpress.org/trunk@40265 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-03-31 16:51:45 +00:00
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