Merge pull request #823 from loiccouturier/master

Fix some stuffs for the front office
Refactor PaymentReturn block to have a main template and specific templates for each connector dynamically included in it.
I18n fixes and code comments and formatting.
Front validation in order process for addresses.
Update admin navigation context
Merge pull request #824 from inthause/documents

Update admin navigation context
Merge pull request #825 from intportg/dev

Front validation in order process for addresses + fixes and refactoring
Enhance attribute to permit to choose between picker or select