Further Gotham updates

Changes to DialogPVRChannelsOSD to bring it inline with Gotham updates

SmartPlaylistEditor updated with Gotham changes

Capitalization fixed in DialogSeekBar as well as artwork layout for landscape items when video is paused

DialogVideoInfo updated to escape the path in case of local trailers

PlayerControls needed an image path fixed for rewind button

Viewtype_Multiplex updated to remove one <posx> reference