User blog comment:Imamadmad/New Navbox/@comment-23204006-20140102153205/@comment-4189499-20140105124724

For the first point, the suggestion given was colour coding by level type rather than difficulty, which would make the coding useful, but I agree that it's a bit unnecessary for what the aim I the navbox is, ie page navigation. For your last point, easy peasy! I'll do it next time I'm at my computer (currently on mobile and I've already complained about editing templates on my phone).