This commit implements an optional developer feature to scramble text
and blur images to prevent distractions during development and testing.
It is not perfect (It breaks some mentions and rich text objects, and
does not scramble non-alphanumeric languages such as Japanese), but
good enough to avoid distractions while working on most features.
No changelog entry is needed because this is not meant for the final
user.
Changelog-None
Signed-off-by: Daniel D’Aquino <daniel@daquino.me>
7684f53281