Sector View tweak

Added options to hide vertical lines and out-of-range star names. It makes 3D-map look less messy.

old:
![old](https://f.cloud.github.com/assets/1286157/321617/d019c8a4-99f3-11e2-8c3d-cb52e772ba15.png)
new:
![new](https://f.cloud.github.com/assets/1286157/321616/c9e6ddbe-99f3-11e2-9867-ffd0086189c2.png)