Sort Listen Again randomly (toggable via setting)

[Vito0912]

Brief summary

This resolves #4129.

I think it makes sense to add it the way proposed in that issue, as it would make sense as a contrary part to discover, which is the opposite of listen again.

It makes listen again sort randomly.

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#4130 does not make sense in my opinion, because it would add more small options and displaying the last 10 listened books does not make that much sense in general. Personally, I never used Listen again, because it only showed the last ten books and it was like "Oh, I listened to that like a week ago."

But maybe others can comment as this is only my view.

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For devs, getting the progress i still possible via the API:
/api/libraries/<id>/items?filter=progress.ZmluaXNoZWQ%3D&sort=progress&desc=1&limit=32

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If that is not wanted, just close that PR :)

Which issue is fixed?

Fixes #4129

In-depth Description

replaced sort by progress to random

How have you tested this?

Own library

Screenshots

[Vito0912]

I added a setting with a default of "random."

One argument on Discord was to see last-played items. I think the purpose of "listen again" is to listen to things again, so random order makes sense as default. For users who want to keep track of what they listened to over the last few days via that feature, they can enable the feature for individual libraries.

@advplyr