Change color #a24689 to #875A7B
Commit https://github.com/odoo/enterprise/commit/8ac1c19fac7615fecd51e670f798d13158a4e53c
changed the odoo interface violet by changing the main LESS variable
but forgot there was many direct occurences in XML/HTML/... (for
example for the mobile browser color).
Even if it's community the odoo interface violet is used at many places
(module description, XML demo data, ...).
As we will soon improve the sanitizer we will be able to sanitize email
templates body. However this implies some cleaning in the templates to
be sure mako is not considered as invalid html / xml and therefore removed
from the template body.