Attempt at Dynamic right click

This is an attempt at making the right click menu dynamic for muting and
unmuting globally. I haven't tested it yet because I can't compile
actionscript in my VB. Ticket #211
Separating mute, unmute buttons in right click menu

Changed the right click menu buttons to separate buttons for
Muting/Unmuting streaming avatars. Not yet Dynamic fully.
Merge pull request #212 from VanessaHenderson/master

Separating mute, unmute buttons in right click menu