MAG540/544 2.20.11 Release Notes

System:
- Fixed "No signal" when turning on the TV
- Reworked saving of MRC pairing records to eliminate deadlock error when trying to activate the test

Playback:
- Fixed long positioning in TimeShift
- Fixed image freeze on stream 
- Fixed positioning error in TV archive
- Fixed image flickering
- Fixed Audio delay on streams with Widevine DRM

Portal:
- Fixed stbapp error when trying to load bbc.com using the web browser in the built-in portal