Hide "completed and ended" shows
I know there are various ways to hide shows on the progress page. But if I use"hide ended shows", it hides the ones that are ended but I haven't completed yet so I can't keep tracking on them. If I use "hide completed", I can't see when the new episode will be of them. So it would be great if you could create a button which hides shows that are both ended AND completed at the same time. This way I could see everything I am interested in right now on my progress page.

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arcreactor commented
I do not know if you know this yet, if so sorry.
This is what I use to hide specific shows in my progress.
If this is not what you are looking for then maybe it can work as a temperary fix.
Hope this helps!You can hide any show that you are done watching from your progress page by clicking the logo of a grey circle with a line through it, next to the name of the show on the progress page.
You can also do this to hide items from your calander except the hide logo is on your calander page next to an episode from the show.
If you need to unhide an item in your progress/calander go to the hidden items page in your settings and click on the item you want to unhide.