This commit injects for each theme a "preferred" palette into the
website's UI palette list ("Theme" tab).
It also removes '$o-palette-priority-prefix' overrides, letting website
handling the palettes order.
task-2656337
closesodoo/design-themes#504
Related: odoo/odoo#77236
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>
This commit updates the theme to improve the design with new colors, new
pictures and new snippet customizations.
task-2555035
Part-of: odoo/design-themes#500