[FIX] pos_self_order: fix menu mode

[fw-bot]

Menu mode was broken in self ordering. This commit fix it.

Forward-Port-Of: #234019
Forward-Port-Of: #232503

[robodoo]

[fw-bot]

@davidmonnom @stva-odoo cherrypicking of pull request #232503 failed.

stdout:

Auto-merging addons/pos_self_order/static/tests/tours/self_order_mobile_tour.js
CONFLICT (content): Merge conflict in addons/pos_self_order/static/tests/tours/self_order_mobile_tour.js
Auto-merging addons/pos_self_order/static/tests/tours/utils/common.js
Auto-merging addons/pos_self_order/tests/test_self_order_kiosk.py
Auto-merging addons/pos_self_order/tests/test_self_order_mobile.py

Either perform the forward-port manually (and push to this branch, proceeding as usual) or close this PR (maybe?).

In the former case, you may want to edit this PR message as well.

⚠️ after resolving this conflict, you will need to merge it via @robodoo.

More info at https://github.com/odoo/odoo/wiki/Mergebot#forward-port

[davidmonnom]

@robodoo r+