FLOE-178: Added "landingPage" to landing page classnames.
FLOE-178: Set default metadata for editing an existing content as well as the default enabled audio for both new and existing content.
FLOE-178: Disabled the "OK" button when there's no input entered into the URL field.
FLOE-178: On the audio panel, moved the location of text "choose all that apply" to be shown and hidden along with audio attributes.
FLOE-178: When editing an existing content, disable the input field and button to stop the video URL from being modified, which is not yet handled.
FLOE-178: Lots of styling tweaks. Removed scrolling.
- lots of tweaks (like transitions)
- metadata and text editor now spans more vertical space.
- removed the scrollbar from appearing on metadata editor.
- removal of scroll bars make a better mobile experience.
Merge remote-tracking branch 'cindyli/FLOE-178' into FLOE-178