Customizer: Replace usage of calc() with box-sizing: border-box.

IE8 doesn't support `calc()`.

props afercia.
see #31336.
fixes #32664.
Built from https://develop.svn.wordpress.org/trunk@32821


git-svn-id: http://core.svn.wordpress.org/trunk@32792 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Dominik Schilling
2015-06-17 19:35:28 +00:00
parent 814865ea9e
commit a1f7f4fe17
9 changed files with 21 additions and 19 deletions

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