[FIX] mail: livechat escaping
[FIX] mail: livechat escaping

- In a livechat window, type a URL, then end by a space. For example,
  type "https://odoo.com " (whithout quotes)
- Press enter

It is converted into "https://odoo.com&nbsp;".

opw-702410

hip-odoo/odoo,dfang/odoo,dfang/odoo,ygol/odoo,dfang/odoo,dfang/odoo,hip-odoo/odoo,dfang/odoo,ygol/odoo,ygol/odoo,dfang/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo,ygol/odoo