Evaluate visualize styling with new mermaid update

[zoeyTM]

I recently opened an issue in the mermaidjs repo asking for a config option to add padding around subgraph titles. That issue has now been closed and the feature PR merged into their develop branch, so, pending their next release (presumably v10.6.2), we should reevaluate our graph styles with the new config setting and see if there's an improvement.

[kanej]

They dropped support for the feature we where waiting on. So this is on ice for the moment.

[zoeyTM]

The feature we were waiting on doesn't seem to have been tested on complex graphs and was broken in ways that makes it unusable for us. This issue is closed now until this PR gets merged, then we can reevaluate.