adjust database size + osx update

Adjust database window size for greater displays:
https://github.com/rpgboss/rpgboss/issues/184

Updating libgdx version to fix some display bugs on osx
![unbenannt-1](https://cloud.githubusercontent.com/assets/342368/5563648/affe911a-8e86-11e4-98ba-f58dfb88020e.jpg)

But now is this and i dont know how to position it.