I am running sagemath 9.8 with jupyter_core 4.11.2 and jupyter_client
7.4.4. I access the sagemath notebook in firefox 116.0.2 on an Ubuntu
22.04 machine. I would like to enable middle-button paste in the
jupyter notebook. My understanding from stack overflow
is that this requires that sagemath's jupyter use codemirror 5.44.0.
That link claims that as of jupyter 6.0.2, it does use a recent enough
version of codemirror. I do not know if jupyter_core 4.11.2 and
jupyter_client 7.4.4 is recent enough or if there is something else I
need to do to enable middle-button paste in sage's jupyter.