Reduce horizontal swipe sensitivity etc

[SpitFire-666]

Not sure if bug or feature request.

When scrolling vertically (using thumb) eg on song or album lists, I often accidentally trigger a sideways (horizontal) scroll. I think it's actually improved a bit recently, but still happens.

I tested on the original Phonograph app and it doesn't have this problem.

Cheers

[chr56]

I actually do not want to "fix" it. :(

See #76