Add a method for listing program items for Mentors and Org Admins on sidebar.
Add a method for listing program items for Mentors and Org Admins on sidebar.

_getOrganizationEntries() method returns all the sidebar items that
are specific to Org Admins and Mentors. Also added apply as mentor
link to the sidebar.

rhyolight/nupic.son,rhyolight/nupic.son,rhyolight/nupic.son