message: temp fix for simple zones
diff: <div class="grid security-group">
  <div class="row">
  <div>{{ 'INGRESS' | translate }}</div>
  - <div>{{ vm.securityGroup[0].ingressRules.length }}</div>
  + <div>{{ vm.securityGroup[0]?.ingressRules.length }}</div>
  </div>
  <div class="row">
  <div>{{ 'EGRESS' | translate}}</div>
  - <div>{{ vm.securityGroup[0].egressRules.length }}</div>
  + <div>{{ vm.securityGroup[0]?.egressRules.length }}</div>
  </div>
  </div>
  </mdl-card-supporting-text>
  