[IMP] sale: product_id_change now supports a void pricelist and/or a void partner_id.
website_quote: validity, options and template now readonly when not in draft
and sent status (aka confirmed).
[IMP]website_quote: replace openerp by odoo in templates, improve quatation emptylist, improve mobile preview by css, add template empty list menutip.

[IMP]add quote_viewd field to check quote is viewed first time and change highlight button accordingly