erp5_officejs_support_request_ui: add preferred_event_resource and preferred_attached_document_classification for support request web site

not user friendly

this fix serach issue when page has listbox

1. add brand
2. facebook like button, twitter share
3. display correct currency symbole
4. product is always available: user can purchase then we order from customer
5. change cache policy

and not safe to install erp5_immobilisation on nexedi erp5