Changes security belt to be more easily clickable

I got some feedback in game from some security players that the new object (inventory) sprite for the sec belt was hard to click on to open, so I reverted it to the old style where it's thicker and easier to click to open it.

![ss 2014-12-21 at 11 56 25](https://cloud.githubusercontent.com/assets/7247232/5522414/07350f6e-896d-11e4-8cf6-967548ee172a.png)
![ss 2014-12-21 at 11 56 29](https://cloud.githubusercontent.com/assets/7247232/5522416/080253c0-896d-11e4-9427-53476c7905b6.png)