Fixes #3940 : Add comment in cleaning property
Fixes #3800 : Refresh directive tree when deleting directive
Fixes #3911: datepicker in search node form is not broken anymore
Merge pull request #321 from VinceMacBuche/bug_3940/add_comment_property_cleaning

Fixes #3940 : Add comment in cleaning property
Merge pull request #323 from VinceMacBuche/bug_3800/refresh_directive_tree_deletion

Fixes #3800 : Refresh directive tree when deleting directive
Fixes #3904 : fixes notifications on group page
Merge pull request #324 from VinceMacBuche/bug_3911/datepicker_issue_search_node

Fixes #3911: datepicker in search node form is not broken anymore
Merge pull request #322 from VinceMacBuche/bug_3904/group_notification_2.4

Fixes #3904 : fixes notifications on group page
Merge branch 'branches/rudder/2.4' into branches/rudder/2.6

Conflicts:
	rudder-core/src/main/scala/com/normation/rudder/domain/queries/CmdbQuery.scala
	rudder-web/src/main/scala/com/normation/rudder/web/components/NodeGroupForm.scala
Merge branch 'branches/rudder/2.6' into branches/rudder/2.7
Merge branch 'branches/rudder/2.7'