UI: retain traffic labels during zone deployment

Author: sudo87

ui/src/views/infra/zone/ZoneWizardPhysicalNetworkSetupStep.vue

@@ -414,7 +414,9 @@ export default {
             if (this.hypervisor === 'VMware') {
               delete this.physicalNetworks[idx].traffics[index].label
             } else {
-              this.physicalNetworks[idx].traffics[index].label = ''
+              if (!net.traffics[index].label) {
+                this.physicalNetworks[idx].traffics[index].label = ''
+              }
             }
             const traffic = net.traffics[index]
             if (traffic.type === 'storage') {