CLOUDSTACK-537: cloudstack UI - Infrastructure menu - create network dialog - Advanced sg-enabled zone - (1) account-specific network doesn't work at backend. Therefore, remove "account" option from scope dropdown. (2) zone-wide network: list only sg network offerings.
CLOUDSTACK-537: cloudstack UI - Advanced sg-enabled zone - VM Wizard - step 5 - select network screen - populate only sg networks (i.e. not show non-sg networks).