Scoped slots are not passed to python described elements

[zceemja]

Description

This is on the same topic as #167 and #501. Here is the code to expand the idea (tested on nicegui 2.5.0):

from nicegui import ui

columns = [
    {'name': 'id', 'label': 'ID', 'field': 'id'},
    {'name': 'name', 'label': 'Name', 'field': 'name'},
]
rows = [{'id': i, 'name': f'row-{i}'} for i in range(5)]

table = ui.table(columns=columns, rows=rows, row_key='id')
table.add_slot('body', r'''
<q-tr :props="props">
    <q-td key="id" :props="props">{{props.row.id}}</q-td>
</q-tr>''')

ui.run(prod_js=False)

And this works as expected. Props are passed down to q-td and is visible from vue debugging on browser:

But this does not work when describing with body slot with python:

...
table = ui.table(columns=columns, rows=rows, row_key='id')
with table.add_slot('body'):
    with table.row().props(':props=props'):
        with table.cell().props('key=id :props=props'):
            ...
...

However there seems to be some disconnect (missing anonymous component?) between body slot and QTr and props.row are not accessible.

Reason why I find this useful is that body description in python enables inserting custom vue components, and the only way I see to do it now is rewriting whole table with custom component as new combined component, which is a lot of duplicated boilerplate code.