Strip control characters

[zerolab]

PostgreSQL (and most other C software) rejects null characters (\0) in strings because reasons.

We should strip out any unwanted control characters from input (most of the C0 and C1 ranges, excluding whitespace).

Tip

To test via the browser, you can use this JS since I can't paste it as it will get removed/escaped.
Run this in the browser console on the edit page, then paste into the field:

copy("This is a null here -->\x00<---")