Fixed pagination issues. (#7558)

- Fixed link elements without "data-page" attributes.
- Fixed loop index limit in browse.php helper.
- Changed too-low default records per page in ExhibitBuilder plugin.
  It's unclear how to do this the "correct" way, and getting too
  time-consuming to figure out how to change it without simply
  upping the default.
- Unwrapped code in main.js that didn't have to be wrapped in a
  jQuery() call.  In that function, also removed  usage of
  jQuery text() function, which does not always return the inner HTML
  of an element, as was expected.
Bumped version to 16.0
Merge branch 'release-v16.0' into develop