Feature Request High-Res icons

[adamprice2]

Not exactly a high-priority request, but the 84x48 icons look a bit rubbish on my 4k tv.
This chunk of code is really ugly, but it replaces them with 640x360 images that look a lot nicer.

def fetch_imageUrl(self, relPath):
               x = self.IMAGES_ROOT + relPath.replace('/images/channels', '')
               return  x.replace("84x48","640x360")

Ideally I guess you should have a configuration item for the size of the icon and let users pick, but that is way beyond my python skills right now.