Voice chat's push to talk need to support more keys

hey i just went to options to set new hot key for trigger my voice but seems it wont support Ctrl key alone. or combination of ctrl+alt and that's not good for me , i'm using TS for years and it's kindda hard to me to get use to new keys for talking with my premades.

so i would to ask is there anyway to get a little hot fix for that or i should just ignore that and keep using TS?