Issue #4209: merge error, missing import
Merge branch 'branches/rudder/2.8' into branches/rudder/2.9
Ref #4178: Rule category backend
Fixes #4177: Improve rule table
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
Remove historization
Remove debug log, rename category to categoryId, do not use dn to store
category id in rule
Handle refresh of table and tree correctly
Display Category diff in Rules
Remove select all button, replace by checkbox
Popup in good shape