add a selection popup for screenshare publish type

bigbluebutton-client/branding/default/style/css/V2Theme.css

bigbluebutton-client/locale/en_US/bbbResources.properties

bigbluebutton-client/resources/config.xml.template

...rc/org/bigbluebutton/main/views/MainApplicationShell.mxml

...utton/modules/screenshare/events/RequestToStartSharing.as

...les/screenshare/events/ScreenshareSelectionWindowEvent.as

...uebutton/modules/screenshare/events/UseJavaModeCommand.as

...ules/screenshare/events/WebRTCPublishWindowChangeState.as

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

...tton/modules/screenshare/managers/ToolbarButtonManager.as

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

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

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

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

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

...ton/modules/screenshare/utils/WebRTCScreenshareUtility.as

...reenshare/view/components/ScreenshareSelectionWindow.mxml

...on/modules/screenshare/view/components/ToolbarButton.mxml

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