ui: Fix clicking the previous button to go back to the Physical Network screen in the Add Zone Wizard (#2767)
ui: Fix clicking the previous button to go back to the Physical Network screen in the Add Zone Wizard (#2767)

In the Add Zone Wizard, when a user lands on the Physical Network page, by default the first Physical Network gets initialized with the 3 Traffic Types: Guest, Management and Public. When a user drags the Management or Public Traffic Types from the first Physical Network to a second or nth Physical Network and then clicks the next button to go to the next screen, and then decides to click the previous button to go back to the Physical Network screen, the UI initializes the physicalNetwork again and thus moves these Traffic Types back to their original position in the first Physical Network as if it is the first time the user navigated to this page.
A fix was made so that when a user clicks the previous button to go back to the Physical Network screen, it does not initialize the physicalNetwork again, therefore leaving the user-defined Traffic Type configuration as it was before the next button was clicked.
GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,wido/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,wido/cloudstack,wido/cloudstack,wido/cloudstack,wido/cloudstack,wido/cloudstack