Fix shipping mode selection.
Misc templates and CSS minor fixes.
Enabled to validate or refuse payment on transactions from the back office.
Merge pull request #845 from intportg/dev

Enable to validate or refuse payment on transactions in BO + fixes
Fix display of attributes axis on variant product.
Enhance block to display detail of document only if it can display on FO
Enhance function exist on document query
Enhance product front office display
Add stock editor for all variant of variant group
Enhance configuration of variant stocks and FO of variant product