The web_editor.colorpicker defines a series of color buttons which
toggle the bg-* and text-* classes. The problem is that themes can
define new buttons whose bg-* and text-* classes only exist in the
frontend. So these buttons should not be displayed in the backend.
Only solution for the current implementation is to add this ugly rule
(in this backend file) which hides every button and redisplayed the
default ones.
This fix is temporary and has to be improved in next versions.
qsm-odoo
89c0266b93