Purpose of this commit to improve generic usage of project app.
So in this commit done following changes:
- add the following filters for project.update search view
- display 'due mm/dd/yyyy' in red if the deadline is in the
past and the milestone hasn't been reached yet for milestone section
- add an 'x Milestones' stat button that should open a list view of all of
the Milestones that are linked to an SOL of this SO for sale.order form view
- add an 'unread messages' filter with separated from other filter
- rename 'create' into 'create project for project wizard
- change to "Create projects to organise your tasks. Define a different workflow
for each project." for project.project action helper
task-2864875
closesodoo/odoo#94936
Signed-off-by: Laurent Stukkens (ltu) <ltu@odoo.com>