The comment screen hides the author column at narrow screen sizes; this adds...

The comment screen hides the author column at narrow screen sizes; this adds back the author info above the comment content. Fixes #26618, props SergeyBiryukov, nacin.


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git-svn-id: https://core.svn.wordpress.org/trunk@26840 1a063a9b-81f0-0310-95a4-ce76da25c4cd