R1:e38b99340853

Allow more characters in a file name

Summary:
Refs T1692 - Borrows from D5192, means suffers from the same problems, too (RTL markers and some more)

Extended the list hidden characters though, some characters of which I thought could confuse other parts of Phabricator

Test Plan:
uploaded some files with a suspicious name of ##[[ .,-#'*`hey`?#+~!"$%&?汉字漢字 seig##

Came out as `[[_.,-_*_hey_汉字漢字_seig`

Looks reasonable enough for me

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: aran, Korvin…