is_active_widget() should skip orphaned widgets.

props Ninos Ego.
fixes #28810.
Built from https://develop.svn.wordpress.org/trunk@29064


git-svn-id: http://core.svn.wordpress.org/trunk@28850 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Grid: make the edit attachment icon clickable.

Props ericlewis.
See #24716.

Built from https://develop.svn.wordpress.org/trunk@29065


git-svn-id: http://core.svn.wordpress.org/trunk@28851 1a063a9b-81f0-0310-95a4-ce76da25c4cd