Feature request - Use dB value instead of % values when moving sources volume.

[BearClaymore]

The use of volume % when using the move action filter on an audio source does not allow for volume fine tuning. I think that allowing it to set (or get the value) in dB would make it easier to set and mange. AT the moment I'm presenting an issue that causes the volume to drop to 0dB when attempting to move the volume to a lower percentage, regardless of that the target value is, as long as it is lower, it just drops to 0. Reported here: https://obsproject.com/forum/threads/move.117568/post-652423