Idea: Start coffee call directly

[mxwnk]

I'd love a way to directly start a coffee call (e.g. when you're already walking to the coffee machine or already there). Maybe on long press of the button?

Originally posted by @t-animal in #25 (review)

Or maybe double tap?

[t-animal]

Double tap is also ok, if we can reliably prevent other coffee callers from notifying an announcement-event first