This commit improves the design of dynamic products templates.
It introduces templates using multiples rows and fine tunes the
design of the other ones.
To make thumbnails work in the template selector, an extra
data-attribute can now be processed by the snippet option.
- data-thumb: it references the location of the thumbnail for a
template. If present the option will show the svg / img.
If not it will display the name of the template.
task-2677203
Part-of: odoo/odoo#80128
Co-authored-by: Arthur Detroux <ard@odoo.com>
