Code Editor: New Colour Requests

I'm not sure how complex this is,  but I think it would be cool to have separate colours for function names and function parameter names. As it stands, they're parsed as identifiers making much code appear the same.

Pretty much impossible to do that correctly without actually doing a full compile of the entire project. You could throw together some heuristics to try to spot things in parentheses, but there will be many ways that it could get it wrong.