Utils: don't treat MS Edge as isWebkit()
Utils: don't treat MS Edge as isWebkit()

Otherwise Framer tries to use JP2 images in Edge, which it doesn't
support.

koenbok/Framer,awt2542/Framer,awt2542/Framer,koenbok/Framer,awt2542/Framer,koenbok/Framer,awt2542/Framer,koenbok/Framer