Message changed for course import when timeout.
STUD-1283
Merge pull request #3232 from edx/waheed/stud1283-added-message-when-timeout-on-import

Warning message changed for course import when timeout.
HD control is hidden initially. On first play of video, when
player.getAvailableQualityLevels returns a non-empty array, it will eventually display, if HD qualities are available (highres, hd1080, hd720). [BLD-937]