Bump version to 1.2.1
Fix  Cinema Trailers shown before TV episodes #1294
Fix PlexContent faulty values in PQ #1292

Was due to Local PQ "size" property not being set.
Fix PlayQueueWindow doesnt refresh properly with local PQ #1296

We were removing items that were copies of the PQ one, which didnt have any effect on local PQ.
Changed it to be based on playQueueItemID property instead.
Added 1.2.1 Release notes
Updating to phv-v1.2.1