Comment 56 for bug 39376

Well it doesn't have to be -one- regex, consider that we could have a configurable list of hidden files patterns.
(Most users know patterns like *.bak more than real regexps like .*\.bak)
So a solution could indeed be a configurable list of patterns, like .*, *~, *#, *.bak, *.db, *.m3u (the comma is just
for this mail; graphically it would appear like a list box with 6 items and add/remove buttons).
I guess it solves my use case of "using a backup file even though it's usually hidden", since the user could
simply toggle "Show Hidden Files" temporarily for this.