wwmm
Add back input/output volume sliders
In the old UI, input and output volume could be adjusted using a slider, this was useful for making quick and imprecise adjustments to volume. Instead, now there is only a Spinner box. It would be very helpful to have the slider back to make adjustments more quickly again
Sorry, the input/output gain of plugins were removed for a specific reason and it's likely that we won't reintroduce them because spinboxes are safer.
Instead the volume slider is returned in the app list.
The spinbox definitely stays because some people prefer the precision it offers. Something that could maybe be considered is showing both. As far as I can see the dangerous behavior that was present in the scales we used on gtk is not present right now. Clicking over the value's text is fine. But the problem is space. I bet many people consider our window cluttered as it is. Putting scales and spinboxes next to each other probably won't help.
