Remove red dot

Remove the red dot indicating data not owned by the user currently logged in
see #1245 and http://trac.openmicroscopy.org.uk/ome/ticket/11039

To test: 
 * Select  the group view.
.* Check that the red not is not displayed for data owned by another user
 * Check: 
    * Data manager
    * central panel
    * Location dialog for the importer
    * Location dialog for projection in main Viewer