Playqueue icon should be accessible on any view

EDIT:

• it seems playqueue is accessible through an up-sliding gesture on the miniplayer. If the playqueue is not empty if and only if the miniplayer is displayed, that could be a convenient way to access the playqueue on the other views.
• However, the gesture is quite hidden, and if this is the real recommended way to access the playqueue outside of the fullscreen player, then it should probably be notified to the user.

Description: Right now, the playqueue icon is displayed only on the player view. However, as there can be a lot of iteractions with the playqueue on the other views (video, audio, playlist, etc), there should be a way to access it - even if the player is stopped.

Expected: Having playqueue icon at the same position as the player view in all video/audio/playlist view (upper right at the moment).

Tested on: iPad pro 2017