if you set backspace as chat key in 0.15 it will work fine in any text field.
however in 0.16 it will close the chat instead of doing it's purpose of deleting one character.
i'm on windows right now. have not tried this on mac or linux yet.
[0.16.4] backspace closes chat if assigned as chat key
Re: [0.16.4] backspace closes chat if assigned as chat key
I suggest you to go add your comment the thread Loewchen linked.
Re: [0.16.4] backspace closes chat if assigned as chat key
thanks. you are totally right. thats the same issue.