Add toggle to sort queue by queue positions

[mmrose]

At the moment, elements in the queue are sorted by it's name.
Please add a toggle or something to sort elements by it's queue position.

[kraiz]

Ordered by priority by default as i would expect this order be default. Feeling different?
Can you please test it together with the changes from #19 (all included in current master branch)?

[mmrose]

It is ordered by priority now, but I don't know if it was before.

[kraiz]

It wasn't. Closing this :)