Reset buttons in UI

[IMNdi]

The volume boost, once enabled, is hard to aim down back to 100%. A reset button would help (or on-off toggle). Ideally, setting it back to 100 or turning it off would also stop processing audio, returning the mute icon on the tab bar which is replaced by the "your audio is being processed" icon.

I would also suggest am off button for the userstring feature, it's easier to use than re-selecting the default.