Purpose of the commit is to do the generic improvements for project.
So in this commit did the following changes:
- the 'upsell opportunity' activity should be generated even
if the service has already been invoiced
- project.task hide the 'create' button if the project in the
context is archived
- project.task portal form view: only the ref of the invoice
should be underlined on hover, not the empty space.
task-2857924
closesodoo/odoo#94776
Signed-off-by: Laurent Stukkens (ltu) <ltu@odoo.com>