* Add a "Posts" sidebar item to groups * Fix James's nits * Show "Add Post" button only to users
* Dashboards in Group about page * Rename group dashboard to 'About Post' * Fixed James nits
* Create backend for Dashboards * Rm lastupdatetime for now * Added a create-dashboard and sharable view dashboard page * Various nit fixes. * Renamed Dashboards to Posts * Fix nits