For the current theme, display all available actions, as dictated by the admin menu.

Restores 3.7 behavior. This could include things like Header and Background as well as theme options pages.

see #25948.

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git-svn-id: http://core.svn.wordpress.org/trunk@26424 1a063a9b-81f0-0310-95a4-ce76da25c4cd