[QSS] Fix QSplitter, makes QSplitter Visible

- QSS Only fix.
- Fix QSplitter.
- Makes QSplitter visible with default theme so you can see and drag it.

![temp](https://cloud.githubusercontent.com/assets/1189414/3020971/045e4f2c-dfa8-11e3-8713-9c6a8aafe956.jpg)


Branch: fix/qsplitter