-menu-item>
                  <md-button ng-click="header.delegate.setDomainType(header, null)"><em>None</em></md-button>
                </md-menu-item>
                <md-menu-item ng-repeat="domainType in availableDomainTypes">
                  <md-button ng-click="header.delegate.setDomainType(header, domainType.id)">
                    <i class="material-icons" ng-style="{'fill':domainType.iconColor}">{{domainType.icon}}</i>
                    {{domainType.title}}
                  </md-button>
   