display two-factor authentication activation in admin area

docs-web/src/main/webapp/src/locale/en.json

@@ -216,6 +216,7 @@
       "add_user": "Add a user",
       "username": "Username",
       "create_date": "Create date",
+      "totp_enabled": "Two-factor authentication enabled for this account",
       "edit": {
         "delete_user_title": "Delete user",
         "delete_user_message": "Do you really want to delete this user? All associated documents, files and tags will be deleted",

docs-web/src/main/webapp/src/partial/docs/settings.user.html

@@ -15,7 +15,10 @@
       <tbody>
         <tr ng-repeat="user in users | orderBy: 'username'" ng-click="editUser(user)"
             ng-class="{ active: $stateParams.username == user.username }">
-          <td>{{ user.username }}</td>
+          <td>
+            {{ user.username }}
+            <span class="glyphicon glyphicon-lock" ng-show="user.totp_enabled" uib-tooltip="{{ 'settings.user.totp_enabled' | translate }}"></span>
+          </td>
           <td>{{ user.create_date | date: dateFormat }}</td>
         </tr>
       </tbody>