CSS for embedding causes blue links on readthedocs

[maartenbreddels]

See http://ipyvolume.readthedocs.io/en/latest/index.html for an example, the links in the menu on the left are blue (it actually stars grey, but jumps to blue when the css is injected).

[pbugnion]

Is this why all the links are blue on ipywidgets readthedocs?

[maartenbreddels]

I don't think so, since on ipyvolume it starts grey, for ipywidgets it stars blue directly.

[jasongrout]

I think this underlying issue causes the problem: jupyterlab/jupyterlab#3257

[jasongrout]

I'll leave this open so that once the underlying jupyterlab issue is solved, we can be reminded to update our dependency to pull in the fix.

[jasongrout]

FYI, I think JupyterLab just had a release with this fix, so we can go ahead and update to pull it in here.

[jasongrout]

We've now updated our dependency.