Be Right Back - Button and clear state symbol in overlay and voice channel list.

Hi, 

I have a sort of ease of use suggestion -

Problem - During group voice channel calls/discussions it can be either disruptive or awkward if someone has to leave their desk/device briefly to go and get a drink or answer the door etc. At the moment you either have to interrupt a conversation to say 'Be right back' or just leave the desk/conversation without interrupting which then wastes time if people are asking you questions but don't realise you aren't there. In a meeting in real life you would be able to see someone quietly leave the room, but in a discord channel there is no clear indicator for this. 

Suggestion - To have a BRB button or symbol to indicated temporary away-ness. The idle status currently doesn't visually show this in a strong and obvious manner.

The button which could go next to the Mute and Deafen buttons would be toggled to clearly show the users status as BRB (or other appropriate symbol)

I've attached a quick mockup of how it could work, this would also be applied to the discord overlay so when in other applications you can clearly see someone as temporarily away in the corner of your screen. 

The actual button doesn't have to be as text as in my example, a nice symbol to match that of the mute/deafen ones would be better. 

This button could be also assigned a keyboard shortcut to easily toggle on and off.