Inverted mouse wheel zoom

[zwzsg]

Spring mouse wheel zoom is inverted compared to the standard used by every other application.

Before I could workaround it by using a negative ScrollWheelSpeed. But now, no matter the sign of ScrollWheelSpeed, it always zoom the wrong way.

fix asap plox

[Chamrin]

Scrolling worked as expected for me with the - in the box (I didn't change it from previous versions though).

Also the default needs to be inverted, every other game/image program that uses scroll to zoom has scroll up = in, and down = out.

[zwzsg]

I just upgraded from 0.82.2 to 0.82.3 and now using -25 invert the mouse wheel zoom again.

[lurker]

I don't think most cameras have a zoom, but okay.