Birdeyeview bugs

This PR should fix few bugs:
 - click on ```hide``` ![16px_minus](https://cloud.githubusercontent.com/assets/1065155/2700552/a103d018-c414-11e3-89e9-e6f51010cef6.png) or ```show``` ![16px_plus](https://cloud.githubusercontent.com/assets/1065155/2700554/ad761b9e-c414-11e3-8948-971f42791bcd.png) shouldn't move image in main viewport,
 - red ROI on bird eye view should follow cursor when moved around.

Cross web browsers testing required