This commit adds a new widget for the bar: A Microphone widget. It is
disabled by default and can can
be enabled with AudioInput: true.
Implements a flyin as well.
https://github.com/scorpion-26/gBar/issues/5 for the ping
When PA_CONTEXT_READY is called multiple times, PulseAudio::FlusLoop() would get stuck to to integer underflow.
Now there are multiple things preventing that.
Possible fix for https://github.com/scorpion-26/gBar/issues/7