Themes: Style the Theme Author the same in the multi and singular view, make the links readable. Fixes #26306

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Themes: Remove an unused Delete Theme link on the multiple view. See #25948

Built from https://develop.svn.wordpress.org/trunk@26459


git-svn-id: http://core.svn.wordpress.org/trunk@26357 1a063a9b-81f0-0310-95a4-ce76da25c4cd