Instead of always polling audio volume, gBar subscribes to events,
causing the update to only happen on demand.
Plus we can block poll updates when there is audio change through gBar,
which results in a much smoother slider.
This change reduces (at least on my end) CPU times from 4-6% per core
to 2-4% per core.
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
