Increase the VSI scale in chopper HUDs

[daranz]

What I'm suggesting is that the vertical speed indicator (the thing on the right) in chopper HUDs should have its scale increased. As it is right now, unless you're breaking the sound barrier as you're plummeting towards the ground, the thing will only move one or two pixels. If it was more sensitive, it could be actually be useful when trying to hover, or when landing. Right now, it only servers to confirm what you can already see by looking outside.