add a "modal-only" copy of bootstrap for use in the tray (fc-bootstrap-tray), and use a separate css namespace to avoid front-end conflicts when creating modals (.fc-tray)

git-svn-id: https://farcry.jira.com/svn/FC/trunk@13026 8f7d33b6-1012-0410-9a5a-bb7ecce9c363