JN 7 → tqdm_notebook(leave=False) → Error displaying widget: model not found

Hi,

This message appears only in JN 7 (not in JN<7) and obviously comes from the fact that tqdm widget is discarded by param "leave=False".

The Jupyter Notebook 7 together with the very last versions of packages (all installed on 27.7.2023) and so far everything works smoothly, however, a minor bug is when using tqdm_notebook(leave=False) inside another widget then in JN is reported "Error displaying widget: model not found".

The code logic is as follows:

```
from ipywidgets import interactive
from tqdm.notebook import tqdm_notebook

def x():
for i in tqdm_notebook(['a'], leave=False):
1

interactive(x)
```

I have reported the issue to tqdm team too.

Best,
Michal

Reproduce the example with Jupyter Notebook 7, ipywidgets interactive, and tqdm.notebook.tqdm_notebook(leave=False). Start by tracing widget disposal and model lookup during the interactive output lifecycle. Done means the example no longer reports “Error displaying widget: model not found” when the progress widget is discarded.

Written by the indexing model from the issue text.