🐛 ipyvuetify widgets do no render in the vuetify-base template when there is a VBox in between.

[maartenbreddels]

Description

ipyvuetify widgets do no render in the vuetify-base template when there is a VBox in between.

Reproduce

The following code snippets show what does render, and what does not (Note that they all render in the classical notebook):

direct child of a vuetify container

import ipyvuetify as v
import ipywidgets as widgets

v.Container(children=[
    v.Btn(children=['does']),
    v.Btn(children=['work']),
], _metadata={'mount_id': 'content'})

vbox in between

import ipyvuetify as v
import ipywidgets as widgets

v.Container(children=[
    widgets.VBox(children=[
            v.Btn(children=['does not']),
            v.Btn(children=['work']),
        ])
], _metadata={'mount_id': 'content'})

vbox + container in between

import ipyvuetify as v
import ipywidgets as widgets

v.Container(children=[
    widgets.VBox(children=[
        v.Container(children=[
            v.Btn(children=['also does not']),
            v.Btn(children=['work']),
        ])
    ])
], _metadata={'mount_id': 'content'})

non-ipyvuetify as leaf nodes:

import ipyvuetify as v
import ipywidgets as widgets

v.Container(children=[
    widgets.VBox(children=[
        widgets.Button(description='but this does'),
        widgets.Button(description='work'),
    ])
], _metadata={'mount_id': 'content'})