If I ever have the time, I might look into customizing an open source editor to make it scroll to the part of the code that contains the label that's clicked in a comment.

Sounds like Exuberant Ctags, a program which produces a tag file that can be parsed by many editors. Admittedly, this requires the program to parse Perl code, which is always a problem. However, in this case, its better to have a partial solution than to have no solution at all.