UPD show vlans when no VNI is set

Closes #756

src/components/BCDId.vue

@@ -7,9 +7,9 @@
                 <i v-else>{{ $t('components.bcd_list.no_vni_set') }}</i>
     </span>
     <b-modal
-        v-if="bcd_vni"
+        v-if="bcd_vni || bcd_vlans.length > 0"
         ok-only
-        :title="'VNI ' + format_vni(bcd_vni.vni)"
+        :title="bcd_vni ? ('VNI ' + format_vni(bcd_vni.vni)) : $t('components.bcd_list.no_vni_set')"
         :id="'vni-vlans-' + bcd.name">
       <p>{{$t('system.net_cmpnd_explain')}}</p>
       <b-table :fields="vlan_fields"