Beta 2 fixes and feedback

[shad0wca7]

Great job so far guys. I recently bought a Dell D3100 to use with my MacBook Air and it's awesome having this laptop drive three displays.

Overall it works great but there are a number of things to report in:

- Safari flickers quite a lot at the top (known)
- Accessing Mission Control seems incredibly slow (system pauses for a few seconds then goes slowly into mission control - the quality of the image for this on the displays using USB is low). Switching desktops etc by swiping seems fine though
- The displays over USB3.0 don't have transparency in the main OSX interface, is this normal?

Edit. I've just found you can eliminate the flickering etc by enabling 'reduce transparency' when the DisplayLink dock is connected - since transparency doesn't seem to work correctly anyway then this works great. I've got another post waiting approval where I describe how this can all be done automatically