Issue #1070058 by jessebeach: Implement a new dropdown button that is somewhat nicer than the older dropdown.

#1065976 by tekante and David_Rothstein: Reset plugin static cache during module enable to prevent stale data from harming export ui.

#999302 by troky: Fix jump menu. Apparently this wasn't actually committed the last time it was committed.

#941800 by me and aspilicious: Use Drupal 7 #machine_name automation on page manager pages and all export_ui defaults.

#951048 by EclipseGc: Tighter entity integration so that new entities are automatic contexts and relationships.

#991658 by burlap: Fully load the "user" context for the logged in user because not all fields are in $user.

Retool dependent.inc to use #pre_render instead of #process so as not to set javascript for form items that will never be seen.