FirewallRules completed workflow with on-the-fly objects creation. Refs #2716
FirewallObjects: don't signal event on create. Refs #2716

New objects are not used by firewall rules: firewall does not need to
be reconfigured.
FirewallObjects: move labels into one catalog. Refs #2716

To ease inclusion from FirewallRules.
FirewallRules/Index: fixed empty rule set submission. Refs #2716
libraries, templates: use new rule format. Refs #2716 #2740