OPAL-2118: Values filter improvements and keep filters when switching tabs

![image](https://f.cloud.github.com/assets/2565497/1673462/6774c250-5ce8-11e3-85a2-1f29cffa7313.png)

![image](https://f.cloud.github.com/assets/2565497/1673471/8f10730e-5ce8-11e3-8f54-59935fdda437.png)