[IMP] website_{portal,portal_sale,project_issue,quote} : add pager for customer documents

This commit adds controller to list documents of customer, with pager and archive
widget to sort documents. Impacted documents are : quotations, sale order,
invoices, and issues.

Portal breadcrumd is improved too : add the home icon, and keep the query
params when using archive widget.

Some editable zones were added to templates, allowing people to customize
their frontend portal.