remove autoStart and autoFullscreen options from the Screenshare module

bigbluebutton-client/resources/config.xml.template

...tton/modules/screenshare/managers/PublishWindowManager.as

...button/modules/screenshare/managers/ScreenshareManager.as

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

...ebutton/modules/screenshare/maps/ScreenshareEventMap.mxml

...ton/modules/screenshare/maps/WebRTCDeskshareEventMap.mxml

...luebutton/modules/screenshare/model/ScreenshareOptions.as

...screenshare/view/components/ScreensharePublishWindow.mxml

...reenshare/view/components/WebRTCDesktopPublishWindow.mxml