disable share a link feature

tracim/tracim/templates/videoconf/toolbar.mak

     ## SIDEBAR RIGHT
     <div>
         <div class="btn-group btn-group-vertical">
-            <a title="${_('Invite by sharing a link')}" class="btn btn-default" data-toggle="modal" data-target="#videoconf-invite-modal-dialog" data-remote="${tg.url('/workspaces/{}/videoconf/invite'.format(result.workspace.id))}" >${ICON.FA('fa-share fa-fw t-less-visible')} ${_('Invite')}</a>
+           ## INFO - G.M - 09-01-2018 - Share a link disabled, because
+           ## link doesn't refresh.
+           ## <a title="${_('Invite by sharing a link')}" class="btn btn-default" data-toggle="modal" data-target="#videoconf-invite-modal-dialog" data-remote="${tg.url('/workspaces/{}/videoconf/invite'.format(result.workspace.id))}" >${ICON.FA('fa-share fa-fw t-less-visible')} ${_('Invite')}</a>
         </div>
         <p></p>
     </div> <!-- # End of side bar right -->