@fatboy Yeah.
Not exactly what I'd like, but definitely the best balance for what I want right now.
(eg. At least in the newest version on *buntu 16.04 LTS, it still doesn't have support for staying resident (and binding the hotkey via XGrabKey) to ensure it stays snappy when a nightly backup run evicts the disk cache.)
I don't trust myself to write C or C++ but, if I can ever find the time to justify taking on another project, maybe I'll write some patches for https://github.com/buster/rrun
@fatboy ...a third option for ShowDotFiles would also be nice, so it hides them from the completion list by default but doesn't refuse to show completions if I explicitly try to Tab-complete something beginning with a dot.