Show error if email already taken on user edit form

webadmin/src/views/users.html

@@ -269,8 +269,7 @@
                                     <i class="fa fa-briefcase arrow" ng-show="user.admin" uib-tooltip="This user can manage apps, groups and other users"></i>
                                 </td>
                                 <td class="hand elide-table-cell" ng-click="showUserEdit(user)" ng-show="user.username">
-                                    {{ user.username }}
-                                    <span class="text-muted">{{ user.email }}</span>
+                                    {{ user.username }}<span class="text-muted" ng-show="user.alternateEmail">{{ '@' + config.fqdn }}</span><span class="text-muted" ng-hide="user.alternateEmail">{{ user.email }}</span>
                                 </td>
                                 <td class="hand elide-table-cell" ng-click="showUserEdit(user)" ng-hide="user.username">
                                     <span class="text-muted" uib-tooltip="User is not activated yet">{{ user.alternateEmail || user.email }}</span>