Introduce a button on the user profile screen which clears all other sessions, and on the user editing screen which clears all sessions. Only appears when there are applicable sessions which can be cleared.

See #30264.
Props jorbin, ocean90, johnbillion



git-svn-id: https://develop.svn.wordpress.org/trunk@30333 602fd350-edb4-49c9-b593-d223f7449a82