Improved pager helper error handling.

Improved the pager help to error gracefully when a request for an invalid
page is made.
Improved paging UI in archival storage AIP browser.

Added a template for advanced paging and updated the archival storage
AIP browser view/template to use it.
Removed unused feature.
Re-added DC tooltips, fixing issues.

refs #4696

Re-added Dublincore tooltips for the metadata add/edit form. Fixed minor
issues with the contextual help JS.