Steps to reproduce the bug:

1. Install PoS
2. Change the Shop type to "Bar/restaurant" (into its setting) then save
3. Go into the newly created "Bar" settings
4. Enable "Direct devices" (with any IP)
5. Open a session on Bar
6. Pick a table
7. Ignore the "Connection to the printer Failed" error
8. Take a coca
9. Click on the "Bill" button
10. On the Bill Printing screen, pick "Print"

Bug:

A traceback was raised

opw:2382350

closes odoo/odoo#62742

Signed-off-by: Simon Goffin (sig) <sig@openerp.com>

1. Introduce an option in restaurant config to allow setting tips after payment.
2. Tip form is shown in bills so the customers can choose/set their tips.
3. Validated orders are kept in TipScreen (access via TicketScreen) so that at the
end of the day, the user/cashier can set the tips for each validated order.

closes odoo/odoo#55488

Task-id: 2117029
Related: odoo/upgrade#1606
Signed-off-by: pimodoo <pimodoo@users.noreply.github.com>