*: web, web_editor, portal, theme_default, website_sale The goal of this commit is to improve the overall style of the default website theme mostly by overriding Bootstrap variables with a bit of customization for more advanced changes. task-3097005 Part-of: odoo/odoo#120302 Co-authored-by: Brieuc-brd <brd@odoo.com> Co-authored-by: Antoine (anso) <anso@odoo.com>