ModalHelper no longer needed after fixing up modal.confirm default ok/cancel dialog
Added new switch 'custom' property. Disables default click handler, lets us display modal dialog without switching underlying option, cancelling modal dialog means underlying switch is never touched.

adding switch.flip(), lets us manually change switch position

formatting, spaces to tabs

player_quality reflects 1080p resolution limit when player_h264 is enabled

use id to directly switch linked options instead of relying on  previousSibling/nextSibling

moved repeating code in player_codecs into common function
player_quality now clearly shows Video wont work when codecs are disabled.