container: fix dvr settings change
html5 video: fix volume position for live stream
hls: remove automatic dvr state change (refs #182)
hls: change dvr controls to use vod settings
media control: add container dvr status handling (refs #182)
media control: fix settings update event handling (refs #182)
background button: add media control settings update handling (closes #182)
media control: fix settings update seek bar animation (refs #183)
media control: improve button visibility