Make "Apply" automatic when closing Settings#253

In Settings, it is messy to change a setting like Music as one has to:

• Select with the volume field
• Change the slider (takes a moment with joysticks)
• Exit field to lock it in
• Navigate all the way down to Apply (takes a moment with joysticks)
• Select Apply to close

Could we remove the necessity to manually click Apply and instead have Settings changes automatically Apply when closing Settings? We have already confirmed the changed settings (at least with audio) by closing the Slider field, it is redundant and cumbersome to require a second confirmation

Thanks!