Merge pull request #5557 from ritzalam/only-one-screenshare-connection

...on/modules/screenshare/managers/WebRTCDeskshareManager.as

...odules/screenshare/managers/WebRTCPublishWindowManager.as

...modules/screenshare/managers/WebRTCViewerWindowManager.as

...button/modules/screenshare/services/ScreenshareService.as

...on/modules/screenshare/services/WebRTCDeskshareService.as

...luebutton/modules/screenshare/services/red5/Connection.as