Make tabs generic for user system-wide
Move ticket preview to a template
Show ticket prview when a ticket number is clicked as opposed to ticket
view.
Add collaborator preview tab on ticket preview tool tip.
Move collaborator specific javascript to collaborator popup window
Add link to manage collaborators on preview.
Change ticket preview popup tab from preview to summary
Change z-index to overlay popup windows correctly
Merge pull request #521 from protich/feature/collaborators-preview

Collaboration Enhancements

Reviewed-By: Jared Hancock <jared@osticket.com>