[Details] Fixed error handling
Fixed switching to None device when something goes wrong with the current device
Backend now takes care when device ID changes - Sound Grid does this when the amount of channel changes and it's not going to change in the neared future.
Fixed sample rate changes notification from device to DAW - Some devices can respond with such updates, we must correctly process them.
This follows the letter sent from Waves Audio Ltd. to Paul Davis dated February 20th 2014 agreeing to release this code
under the GNU Public License, version 2, with copyright owned by Waves Audio Ltd
