when pushing views for content, disactivate transitions

still keep transition on pop but no longer on push

fixes opacity sometime being equal to 0 without a clear explanation
1 job for !136 with T12424-playlist in 20 minutes and 36 seconds (queued for 11 minutes and 59 seconds)
detached
Status Job ID Name Coverage
  Build
passed #67881
linux kf5-qt5 qt5.12

00:20:36

86.0%