chalkboard is not working

[szazs89]

Is your feature request related to a problem? Please describe.

Original RISE has this nice feature, which is missing / not working in jupyterlab-rise.
The '?' icon for shortcut-keys is also missing.

Describe the solution you'd like

Accessible chalkboard feature as in original RISE which worked with classic jupyter notebook interface.

Additional context

• Python package version: 3.10.12
• Extension version: jupyterlab_rise 0.42.0

extension lists

# jupyter-labextension list
JupyterLab v4.0.12
/usr/local/share/jupyter/labextensions
        jupyterlab_pygments v0.3.0 enabled OK (python, jupyterlab_pygments)
        nbdime-jupyterlab v3.0.1 enabled OK
        jupyterlab-rise v0.42.0 enabled OK (python, jupyterlab_rise)
        ipyparallel-labextension v8.6.1 enabled  X
        jupyter-matplotlib v0.11.3 enabled OK
        @jupyterlab/git v0.50.0-a1 enabled OK (python, jupyterlab-git)
        @jupyterlab/latex v4.0.0 enabled OK (python, jupyterlab-latex)
        @jupyter-widgets/jupyterlab-manager v5.0.9 enabled OK (python, jupyterlab_widgets)
        @jupyter-notebook/lab-extension v7.0.7 enabled OK

# jupyter-server extension list
Config dir: /root/.jupyter

Config dir: /usr/etc/jupyter

Config dir: /usr/local/etc/jupyter
    ipyparallel enabled
    - Validating ipyparallel...
Extension package ipyparallel took 0.1773s to import
A `_jupyter_server_extension_points` function was not found in ipyparallel. Instead, a `_jupyter_server_extension_paths` function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.
      ipyparallel 8.6.1 OK
    jupyter_lsp enabled
    - Validating jupyter_lsp...
      jupyter_lsp 2.2.2 OK
    jupyter_server_mathjax enabled
    - Validating jupyter_server_mathjax...
      jupyter_server_mathjax  OK
    jupyter_server_terminals enabled
    - Validating jupyter_server_terminals...
      jupyter_server_terminals 0.5.2 OK
    jupyterlab enabled
    - Validating jupyterlab...
      jupyterlab 4.0.12 OK
    jupyterlab_git enabled
    - Validating jupyterlab_git...
      jupyterlab_git 0.50.0a1 OK
    jupyterlab_latex enabled
    - Validating jupyterlab_latex...
      jupyterlab_latex 4.0.0 OK
    jupyterlab_rise enabled
    - Validating jupyterlab_rise...
      jupyterlab_rise 0.42.0 OK
    nbdime enabled
    - Validating nbdime...
      nbdime 4.0.1 OK
    notebook enabled
    - Validating notebook...
      notebook 7.0.7 OK
    notebook_shim enabled
    - Validating notebook_shim...
A `_jupyter_server_extension_points` function was not found in notebook_shim. Instead, a `_jupyter_server_extension_paths` function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.
      notebook_shim  OK

• Operating System and its version:
  Ubuntu 22.04.3 LTS (in docker image created from jupyterhub/jupyterhub:4.0.2)