Volume to jump like VLC does.

[Trond007]

VLC volume adjustments is very good. I mouse scroll 25% at a time. Mousescrolling volume in smplayer is unusal as it is slow in adjusting the volume, and no % to indicate where I am at. I don't think it was 25% in VLC at a time I used to jump, but the difference was quick and significant without it jumping too much.