At the moment, the pos displays the selected order in multiple
screens, such as the `ProductScreen`, the `TicketScreen`, the
`SplitBillScreen`, the `self_order` app, but uses completely
different implementations for each. This means that when
a change needs to be made to the one, it generally needs to be made
to the other as well, which is error-prone.
In this commit we create generic `OrderWidget` and `Orderline` components,
that have not dependencies on POS objects and we refactor the `ProductScreen`,
the `TicketScreen` and the `SplitBillScreen` to use these components.
The `OrderSummary` component was removed and it's contents are now in the
`OrderWidget`.
We also introduce a very simple new component called `CenteredIcon` that
can be used whenever we want to show an icon that fills a whole div. In this
commit we use it for showing the cart icon when the order is empty.
In a future commit, the `pos_self_order` will be refactored in order
to use the same `OrderWidget` and `Orderline` compoenents as the POS.
Task: 3470365
In addition, this commit solves the issue from the task 3491303.
closesodoo/odoo#132248
Related: odoo/enterprise#45972
Signed-off-by: Joseph Caburnay (jcb) <jcb@odoo.com>
vlst
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