Added support for SiennaLink 4:2:2

iOS15 Support
New Icon

New Performance Trace Preference for connection troubleshooting.

Improved AV Sync recovery after network interruption

Added support for selection of stereo pair from multichannel audio stream.
Moved settings to System Preferences panel

Fixed deadlock issue which could stall streams.

Stream ID Compatibility with latest server.

Fix issue changing streamkeys

Added support for Streamkeys

Reduced RAM utilisation for improved performance