Invisible displaynames possible

[wertzuz]

Guidelines

• [x] I have searched searched open and closed issues for duplicates
• [x] I am submitting a bug report for existing functionality that does not work as intended
• [x] This isn't a feature request or a discussion topic

Bug description

It is possible to set your display name to an empty character sequence by using special Unicode characters. A list can be found here, thought I tested not all of them but many do work: https://invisible-characters.com/ I think this is a but since setting you display name to a single space is not allowed and leaving it empty is also not permitted.

Screenshots

Device

No response

Android version

No response

Signal version

newest beta

Link to debug log

No response