message: ng-if instead of ng-show to prevent duplicated ids
diff: <li role="presentation" ng-show="authenticationProviders.includes('LDAP')" class="auth-modal-tab" ng-class="{active: isLdapLogin()}"><a style="color: white" href ng-click="showLdap()">LDAP</a></li>
  </ul>
  </div>
  - <div ng-show="isStandardLogin()">
  + <div ng-if="isStandardLogin()">
  <login-form auth-type="standardLogin"></login-form>
  </div>
  - <div ng-show="isLdapLogin()">
  + <div ng-if="isLdapLogin()">
  <login-form auth-type="ldapLogin"></login-form>
  </div>
  <div class="clearfix"></div>
  