Allow user volume slider to be set to 200%

[bblacher]

Your use case

What would you like to do?

I'd like to be able to set other user's volumes past 100%

Why would you like to do it?

Sometimes call members are way too quiet, the only option is to ask these people to boost their microphone volume. (This is another issue right now because automatic gain can't be disabled if Element Call is used within Element Desktop)

How would you like to achieve it?

The volume slider should go to 150% or 200%

Have you considered any alternatives?

Asking people to boost their volume is a temporary fix until automatic gain control turns them down again. Boosting desktop volume and decreasing all other participants would also be possible but very inconvenient.

Additional context

No response