Issue with the detectorSize option

[maciej-zabielski]

First of all - thanks a lot for sharing this plugin - it works fantastic and makes a great use of google library!

I have an issue with detectorSize option. When this option is at 0.5 the close and light buttons seems be positioned based on that area.
If this is increased to 0.8 or 1, the buttons go outside of the screen area. They should be posistioned always in the same part of the screen, regardless of the "detector window.