[pvr] remember last watched group
[pvr] set the last played group as selected group at startup
AESinkPULSE: Start stream corked. Resume when starting to add packets
Merge pull request #3988 from xhaggi/remember-last-watched-group

[pvr] remember last watched group
Merge pull request #4670 from fritsch/pacork

AESinkPULSE: Start stream corked. Resume when starting to add packets