Fix the cyclone file i/o features (coll, hammereditor). Replaces non-functioning legacy (tcl/tk) calls. Backport from DISIS Pd-l2ork, cf. https://github.com/pd-l2ork/pd-l2ork/commit/8a93fa83. This needed quite some editing to apply cleanly to our codebase and to get rid of whitespace glitches obfuscating the real changes. But that's (mostly) cosmetic, functionally it works the same.
Also found and fixed some glitches in the seq help patch.