Increase max character number in global chat messages

Is there anyway to increase the characted number in messages like to 256 characters instead of the default. Iv tried changing the "Maximal Characters Per Message": 256, but it doesnt do anything. I hate typing an explanation in global, only to have to retype the last part, or split the message up into two messages.
Thanks in advance! Awesome plugin BTW :D

I believe that is a limit in Rust.

Hey Wulf :) 

I figured as much!