Scroll wheel up/forward should be "zoom in" whenever possible
Scroll wheel up/forward should be "zoom in" whenever possible

There are two changes here:

First, we now correctly respect OS X's "Scroll direction: Natural"
setting in Safari. I.e., if you turn that setting off, sliding your
fingers up on your trackpad will still result in a zoom-in gesture.
(Firefox and Chrome don't support the APIs needed for this, so if you
turn that setting off then in those browsers you'll have to slide your
fingers down to zoom in.)

Second, the zoom direction has been fixed on Windows/Linux. Scrolling
your mousewheel up now results in zooming in, just like it does on OS X.

tmm1/stackprof,tmm1/stackprof,tmm1/stackprof,tmm1/stackprof