Missing SVG config for mathjax #1213
Description
It appears that the bundled mathjax installation is missing the config files for SVG rendering. When right-clicking on a mathjax formula , and choosing Math Settings > Math Renderer > SVG, I get a an error
404 GET /static/components/MathJax/jax/output/SVG/config.js?rev=2.5.3
Indeed it is easy to verify that the underlying directory in site-packages only contains HTML-CSS/config.js, but not SVG/config.js. The problem is that the choice for the SVG renderer is cached by the browser. As a result, viewing any subsequent notebooks results in the 404 error (which is generally not visible to the user) and completely deactivates the mathjax capabilities (a markdown cell with LaTeX will not be rendered at all). This is then permanent; the only way to recover from the bug is to clear the browser cache.
I would strongly advocate to include the SVG renderer in the bundled mathjax installation, not only in order to avoid the above bug, but also because I still find that SVG-rendered mathjax looks nicer for operators with hats (as are commonly used in quantum mechanics).