Add CSS for filters group toggle indicator
Add CSS for filters group toggle indicator

Fixes #6
atamashi/GeneratorBundle,ksn135/GeneratorBundle,symfony2admingenerator/GeneratorBundle,Restless-ET/GeneratorBundle,atamashi/GeneratorBundle,bobvandevijver/GeneratorBundle,Lionel09/GeneratorBundle,Restless-ET/GeneratorBundle,atamashi/GeneratorBundle,Restless-ET/GeneratorBundle,ksn135/GeneratorBundle,symfony2admingenerator/GeneratorBundle,RunOpenCode/GeneratorBundle,symfony2admingenerator/GeneratorBundle,RunOpenCode/GeneratorBundle,Lionel09/GeneratorBundle,Lionel09/GeneratorBundle,bobvandevijver/GeneratorBundle,ksn135/GeneratorBundle,RunOpenCode/GeneratorBundle