This commit allows assignment and visibility of colors to course tags.
In order to reuse existing code, the colors offered are the same colors
used for Kanban tags.
Visibility of these tag colors has been added to:
- slide channel form view
- individual course website
- courses (not-filtered) website
- user profile "about" page
Note that visibility was purposely not added to:
- Kanban view for courses since "no color" assigned tags are not shown in
the kanban view by pre-existing design.
- Filtered courses website since selected tag filters are already
color highlighted to make selected tag filter(s) more obvious.
Supports Task: 2128166
PR #44365
Upgrade PR: odoo/upgrade#862
Tiffany Chang (tic)
4bc66ffc79