Drop vendor prefixes for border-radius

http://caniuse.com/border-radius
* -moz is for Firefox 3.6
* -webkit is for Chrome 4, Safari 4, and iOS 3

Also:
* Vendor prefixes should go before the standardised one.
  http://css-tricks.com/ordering-css3-properties/
* jquery-ui vector theme was missing standardised properties
  in some cases. Added those.

Follows-up c6b0205

Change-Id: I150626e5fba3d65128c14e0945b83ac65efd3078
Merge "Drop vendor prefixes for border-radius"