queries.html: use the catalog's stored language for syntax highlighting
queries.html: use the catalog's stored language for syntax highlighting

Remove the 'store' hack. This breaks the behavior for old programs in
the main production, but I'm okay with that. Also, add support
for the other two languages.

Requires uwescience/myria#724

uwescience/myria-web,uwescience/myria-web,uwescience/myria-web,uwescience/myria-web