Ref #4178,#4181: Front end rule category + Directive page
Ref #4182,#4183: Directive Application first commit
Ref #4178: Rule category; final display
Ref #4182,#4183 : Directive application V0.1
Ref #4178: Add back modRuleCategory
Ref #4179 : Add Create and Edit Popup, remove drag an drop in Directive
Fixes #4178 :Rule category display
Ref #4182,#4183: Correct the behaviour of directive creation with change request
Fixes #4179: Delete popup
Fixes #4181,#4182,#4183: Directive Application : handle dependencies on Directive creation +
apply