Merge pull request #771 from inthause/documents

Add management of Cart filters
Fixes #769 (creation and edition from pickers).
Cleanup (removed jstree, "cascade*" methods, ...)
Merge pull request #772 from fredericbonjour/Admin

Fixes #769 (creation and edition from pickers).
en_US update from crowdin
[FIX] incorrect publication status icon on webkit browsers
Merge pull request #773 from franckstauffer/fix

Locales + incorrect publication status icon on webkit browsers
Minor locales and layout fixes
en_US locales updated
Bad locale
en_US locale updated
Removed useless help text
removed filter rbsCapitalize breaking label cases
Locales fixed
Update documents import / export
Add edition of 'targetId' price document property
Remove unused 'indexed' and 'cascade-delete' attribute on document property model
Code cleanup