Use an AccordionPanel for the side panel?

[jtpio]

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

Currently the JupyterLab git panel looks like this:

While the other panels use a more consistent collapsable side panel:

Describe the solution you'd like

Maybe the jupyterlab git panel could make use of the SidePanel / AccordionPanel from JupyterLab for consistency?

Describe alternatives you've considered

N/A

Additional context

• Python package version: 0.50.1

• Extension version: 0.50.1

• Git version: 2.46.2

• Operating System and its version: