Configurable limit for Volume filters

[HEnquist]

Volume filters should have min and max parameters. If the volume is set to a value outside the allowed range, the actual applied value should be clamped at the nearest limit.

[timsurber]

@HEnquist This is set as completed, but where can I set the clamp limit?

[HEnquist]

This was not implemented as described here. Instead I added a limiter filter. It's a different but not equivalent solution to the problem of limiting the max volume going out. I should have added a comment about that when I closed this issue. And I probably should not have closed it. I'll reopen and implement this for 3.0.

[timsurber]

@HEnquist Would you consider adding a lower limit as well? When controlling it with an remote it can happen that you press the volume down button too long accidently, and then it can take quite a while to get up again.

[HEnquist]

Adding a lower limit won't help with that. The limit does not limit what values the websocket interface accepts, it only clamps what the volume control actually applies.