use a binding to connect to playlist in views

should allow the initial view to get the correct link to the playlist

fix enqueue from items in the initial view
2 jobs for !179 with fixEnqueueInitialView in 16 minutes and 27 seconds (queued for 37 seconds)
detached
Status Job ID Name Coverage
  Build
passed #73519
linux kf5-qt5 qt5.12

00:15:47

86.0%
passed #73518
reuse

00:00:39