Point of Sale self-order configurations now keep preset information up to date even when demo data is not installed. If no presets exist, preset use is disabled automatically, while manually created presets are included in the default setup to reduce configuration issues.

Before this commit:
===
- Preset data was not updated for self order (without demo data)

After this commit:
===
- Preset data updated in pos self order (without demo data)
- If there are no presets found, set 'use_presets' as False
- if there is any manually created preset, add it to the default preset

Related PR: odoo/odoo#194777
Related PR: odoo/odoo#199161

Task: 4501570, 4612542

This update refreshes several Point of Sale screens and popups to make daily checkout workflows clearer and easier to use. It also reverses a prior restaurant table naming change, helping keep the current restaurant flow consistent while the POS interface cleanup is delivered.

[IMP] point_of_sale, *: revamp UI
*: pos_restaurant

This commit introduces some UI cleaning for the POS.

task-4496287

Related: https://github.com/odoo/enterprise/pull/77942

The restaurant appointment point-of-sale interface has been refreshed to make floor planning and appointment scheduling easier to read and use. This improves day-to-day usability for restaurant staff, with related test updates to keep key workflows reliable.

[IMP] pos_restaurant_appointment: revamp UI
This commit introduces some UI cleaning for the POS.

Related: https://github.com/odoo/odoo/pull/195386