fixes translator comment
fixes #2475 - search hosts based on comments
fixes #2426 - translate model and column names to English
fixes #2401 - cannot create new admin user
Fixes #2459 - Create ProxyFeature methods from symbol name, lookup on real text
Fixes #2461 - Allow user to not have a puppet proxy
fixes #2132 Smart Variables in hostgroup.
1. Show smart variables in hostgroup view.
2. Added the GUI to override smart variables values in host group.
Suport hostgroup puppet classes parameters inheritance.