[Feature Request] Custom channel name by built-in keyboard.

[MaiLunJiye]

In the original firmware, uvk5 just only can save channel with the name 'CH-XXX'. If we want to custom channel name, we have to write channel by pc, which is so inconvenient. I hope we can custom channel name by built-in keyboard, and hope this feature can be implemented in the 's_bar' firmware.