Add theme-specific positioning of edit shortcuts in Twenty Fourteen and Twenty Seventeen. Props sirbrillig, sstoqnov, westonruter. Fixes #38651. Built from https://develop.svn.wordpress.org/trunk@39233 git-svn-id: http://core.svn.wordpress.org/trunk@39173 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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