Multiple backspaces in one frame corrupts an inbox box

[abrenneke]

I'm sure you never had to run into this... it's happening with some mod changes I'm making where the game can lag while typing (search box).

Basically, I believe it appends multiple \b characters at once, and because \b\b\b != \b it appends them to the input instead of deleting the last character, adding corrupted □ characters.

This area of the code I believe