more new UI content
partial for editing a user's metaspace access and enabled status
added json mode for metaspace_access_edit_form and metaspace_access_edit.
more UI implementation.

*fixed unselection of selected rows (for lists of users and nodespaces: nodespace_list.html, user_list_metaspace.html, user_list_nodespace.html, trpl-ng.js).
*refactored status message display to statusmessage directive (user_change_password.html, user_info_edit.html, trpl-ng.js).
*implemented metaspace command UI for: user info edit, change user password, metaspace privilege edit, metaspace enabled edit (user_change_password.html, user_info_edit.html, trpl-ng.js).
*stubbed out state for user audit trail display (trpl-ng.js).