FLOE-113: Implemented the audio metadata panel.
FLOE-113: Replaced tabs in style.css with spaces.
FLOE-113: Fixed the panel flickering issue in the audio metadata panel when switching btw audio attributes.
Merge remote-tracking branch 'cindyli/FLOE-113'

* cindyli/FLOE-113:
  FLOE-113: Fixed the panel flickering issue in the audio metadata panel when switching btw audio attributes.
  FLOE-113: Replaced tabs in style.css with spaces.
  FLOE-113: Implemented the audio metadata panel.
Merge branch 'master' into FLOE-112
Merge remote-tracking branch 'jhung/FLOE-112' into FLOE-112
Merge remote-tracking branch 'jhung/FLOE-112' into FLOE-112
Merge remote-tracking branch 'jhung/FLOE-112' into FLOE-112
FLOE-112: Preventing default action for OK button

Preventing the default action (form submission) for the OK button used to enter a video url. Also added a comment to the reset method.