Open AutoComplete to the top

Hey, cool extension! Just one problem: when I open the auto-complete the list pops up from cursor downwards which makes the usage of the list very hard because I have to scroll manually down to see the list at all.

![image](https://f.cloud.github.com/assets/462013/1234066/773b386e-2957-11e3-834f-75ce59333a87.png)

![image](https://f.cloud.github.com/assets/462013/1234069/9a139dd6-2957-11e3-80fa-d9b9fbef21e9.png)

Please change this behavior to the same as chrome's dev tools:

![image](https://f.cloud.github.com/assets/462013/1234071/df5b3962-2957-11e3-9c53-35378af460ab.png)

Cheers!