* use Q_DECLARE_FLAGS NotificationFlag/Notification for sounds, not the weird version from very early swift days
* splt into h/cpp files
* added new sounds
The voice room callsign will be set from the current context values right
before a new connection is made. Therefore all updates in between are not
necessary and can be removed.
ref T354
* Info for which machine audio setup is displayed
* Obtain audio "location"
* Remark: Audio can run on core and in GUI which is different from other contexts