Queue Page improvement ideas

[luzip665]

I wonder if it is impossible to

see the play/pause icon on the queue tab
find the currently played song in the queue tab

So I added both things to the QueuePage in PR draft #782. I'm quite sure, this can be done better. The icons can be moved to the PlaylistPageBase or so.

Additionally I would like to change or extend the behaviour of the option queue/remove_item_when_played.
Imo it should be possible to leaf the currently playing track in the queue and remove just after playing.
Doing so it would also be possible to find the currently playing song also if it is in the queue.
This may also affect #662

Does someone agree?

(Moved from #781)

[luzip665]

A further idea is to display track count and at least the remaining time of the queue on the bottom right corner of the tab.