lazy loading fix in iPad Mode
first commit
Mute Button Fix -  MUTE ALL button does not work  (todo)
Video Toolbar Display in iPad mode, no matter I tapped the video or not.
 Always show Stream Name and MUTE row in iPad mode(todo)
Button Text Fix in iPad Mode -  Change the text of "Audio/Video" button (todo)
one video always goes away and come back (todo)