- fix bug where requesting to send a key frame fails to get the correct stream name

bigbluebutton-client/src/DeskshareStandalone.mxml

...luebutton/modules/deskshare/events/StartedViewingEvent.as

...bluebutton/modules/deskshare/managers/DeskshareManager.as

...ebutton/modules/deskshare/managers/ViewerWindowManager.as

...gbluebutton/modules/deskshare/maps/DeskshareEventMap.mxml

...bluebutton/modules/deskshare/services/DeskshareService.as

...gbluebutton/modules/deskshare/services/red5/Connection.as

.../modules/deskshare/view/components/DesktopViewWindow.mxml

.../bigbluebutton/deskshare/server/sessions/SessionSVC.scala

...bluebutton/deskshare/server/stream/DeskshareService.scala

...scala/org/bigbluebutton/deskshare/server/svc1/Block.scala

...rg/bigbluebutton/deskshare/server/svc1/BlockManager.scala