PainlessMesh: Figure out why disconnection of nodes takes so long

[niniack]

• Raising an issue on Gitlab to ask about why this is the case and whether it is tunable (https://gitlab.com/painlessMesh/painlessMesh/-/issues/390)

[niniack]

Seems like there is no direct way to reduce disconnection time.

At the consensus level, I suppose we could make assumptions about disconnected nodes if they do not provide a response.