Tweak the UI a bit.

This updates native so we can use the new ChoiceWithValueDisplay subclass, and changes the post processing (displays the shader being used), MAC address randomiser (it will instantly update the text on the right once it's changed), and proAdhoc editing (display the server address on the right, for non-Qt and non-Windows) choices to display values to the right.

A couple screenshots:
![Screenshot 01](http://i.minus.com/izN8DArixB6oQ.jpg)
![Screenshot 02](http://i.minus.com/ibqgRut9a8siYm.jpg)