Add toggle to always show yourself

[robintown]

Based on #2368

[toger5]

This looks good. Thanks.
Can you help me understand the reason local an remote user are different classes instead of a property on the user tile?

[toger5]

This does not immediately translate to a bin in my head.
In SelfAlwaysShown i would expect just myself.
What should i expect in a bin that includes participants that match: SelfNotAlwaysShown

[toger5]

What do you think about calling the bin enum sth like BinType since it is not the bin itself?

[robintown]

I would say that a SortingBin is the bin itself, on a conceptual level. In my mind, calling it BinType would imply that you can instantiate multiple distinct Bins for any BinType, but a Bin doesn't really need to encode any more information than BinType does, so… a SortingBin already seems like a unique reference to the area that we see on screen.

Does that make sense at all? What is a 'bin', to you?

[robintown]

The reason I've split up local and remote user media into different types is that they have distinct sets of properties (local media can be always shown/never shown, remote media has a volume, etc.), and I wanted to enforce that the views that consume them would be fully aware of their differences in functionality. It's the same reason why screen share media has its own type.

[robintown]

Since you've approved this I'm going to merge it and continue working through the PR stack - I'm happy to iterate later on the SortingBin topic if you do have concerns there!