Click handler is broken with matplotlib>=3.5

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## Describe the issue
The click handler doesn't seem to have any effect:
The issue can be reproduced using the pixelstitch package following the installation instructions in this issue:
https://github.com/ducha-aiki/pixelstitch/issues/1#issuecomment-2269974339

## Versions
Affected matplotlib versions are 3.5-3.9
Affected jupyer versions are:
- classical notebook <7
- jupyter lab 4.2.4

```bash
python -c "import sys; print('\n',sys.version); import ipympl; print('ipympl version:', ipympl.__version__)" && jupyter --version && jupyter nbextension list && jupyter labextension list
```
classical notebook -->
```
jupyter labextension list

3.10.14 (main, May 6 2024, 14:47:20) [Clang 14.0.6 ]
ipympl version: 0.9.4
Selected Jupyter core packages...
IPython : 8.26.0
ipykernel : 6.29.5
ipywidgets : 8.1.3
jupyter_client : 7.4.9
jupyter_core : 5.7.2
jupyter_server : 2.14.2
jupyterlab : not installed
nbclient : 0.10.0
nbconvert : 7.16.4
nbformat : 5.10.4
notebook : 6.5.7
qtconsole : 5.5.2
traitlets : 5.14.3
Known nbextensions:
config dir: /Users/dawars/miniconda3/envs/pixelstitch/etc/jupyter/nbconfig
notebook section
jupyter-matplotlib/extension enabled
- Validating: OK
jupyter-js-widgets/extension enabled
- Validating: OK
usage: jupyter [-h] [--version] [--config-dir] [--data-dir] [--runtime-dir] [--paths] [--json] [--debug] [subcommand]

Jupyter: Interactive Computing

positional arguments:
subcommand the subcommand to launch

options:
-h, --help show this help message and exit
--version show the versions of core jupyter packages and exit
--config-dir show Jupyter config dir
--data-dir show Jupyter data dir
--runtime-dir show Jupyter runtime dir
--paths show all Jupyter paths. Add --json for machine-readable format.
--json output paths as machine-readable json
--debug output debug information about paths

Available subcommands: bundlerextension console dejavu events execute kernel kernelspec migrate nbclassic nbconvert nbextension notebook qtconsole run server serverextension troubleshoot trust

Jupyter command `jupyter-labextension` not found.```

Jupyter lab -->
```
3.10.14 (main, May 6 2024, 14:47:20) [Clang 14.0.6 ]
ipympl version: 0.9.4
Selected Jupyter core packages...
IPython : 8.26.0
ipykernel : 6.29.5
ipywidgets : 8.1.3
jupyter_client : 8.6.2
jupyter_core : 5.7.2
jupyter_server : 2.14.2
jupyterlab : 4.2.4
nbclient : 0.10.0
nbconvert : 7.16.4
nbformat : 5.10.4
notebook : not installed
qtconsole : not installed
traitlets : 5.14.3
usage: jupyter [-h] [--version] [--config-dir] [--data-dir] [--runtime-dir] [--paths] [--json] [--debug] [subcommand]

Jupyter: Interactive Computing

positional arguments:
subcommand the subcommand to launch

options:
-h, --help show this help message and exit
--version show the versions of core jupyter packages and exit
--config-dir show Jupyter config dir
--data-dir show Jupyter data dir
--runtime-dir show Jupyter runtime dir
--paths show all Jupyter paths. Add --json for machine-readable format.
--json output paths as machine-readable json
--debug output debug information about paths

Available subcommands: dejavu events execute kernel kernelspec lab labextension labhub migrate nbconvert run server troubleshoot trust

Jupyter command jupyter-nbextension not found.```

Inizia riproducendo il malfunzionamento del click-handler con il pacchetto pixelstitch e le versioni classiche di Notebook e JupyterLab elencate nell’issue. Confronta gli ambienti interessati con matplotlib 3.5–3.9 e verifica che i clic producano l’interazione prevista in ogni ambiente supportato.

Scritto dal modello di indicizzazione a partire dal testo della issue.