SAK-25523 modify the mic check feature to be hidden once recording starts


git-svn-id: https://source.sakaiproject.org/svn/reference/trunk@133582 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-25523 allow user to playback the recording and have the scrubber timer move accurately


git-svn-id: https://source.sakaiproject.org/svn/reference/trunk@133585 66ffb92e-73f9-0310-93c1-f5514f145a0a