Solves issue #60
Solves issue #60

Changes the z-index of the fields to ensure they appear above the
player. The reason for why this appeared only in the preview-player,
and none of the others, is unknown, but likely a browser quirk.

DanThrane/tekvideo.sdu.dk,DanThrane/tekvideo.sdu.dk,DanThrane/interactive-videoes-grails,DanThrane/tekvideo.sdu.dk,DanThrane/tekvideo.sdu.dk,DanThrane/interactive-videoes-grails