Sound brick updates

* These bricks now use a .1 increment for the volume editable
* They also actually use their volume editable to control the volume

STR
* add any / all of these to an app
* volume editable for all of them should increment by .1 when using the little arrows on the input field
* the volume editable actually controls the volume of these bricks

Partly fixes #1961 - can you comment on that one @Pomax ?