Merge pull request #671 from renaudJennyRBS/fix

Provide few evolutions
[FIX] Handle menu deactivation.
Remove obsolete attributes from some models.
Fix document picker single display with specific item template.
[FIX] Document and documentArray attributes display in front office.
Clean brand editor.
Fix rounding methods in price editor.
Misc template and style fixes.
Add Elasticsearch serveur status info on REST Index Documents
Refactor VariantGroup document
Merge pull request #675 from intportg/dev

Fixes and cleanings.
Merge pull request #676 from inthause/documents

Refactor VariantGroup document
Fix avatar manager
Fix fatal error in workflow
Enhance NotificationCenter. Fix #507
Merge pull request #677 from loiccouturier/master

Fix avatar manager. Fix fatal error in workflow. Enhance NotificationCenter. Fix #507
Spellchecking
US Localization
Fixed JavaScript object creation for Main menu.
Fixed strange behaviour with z-indexes and 3D transformations in Main menu.