fix logic to avoid warnings regarding Java on updated Firefox

bigbluebutton-client/locale/en_US/bbbResources.properties

bigbluebutton-client/locale/pt_BR/bbbResources.properties

...rc/org/bigbluebutton/modules/deskshare/utils/JavaCheck.as

...dules/deskshare/view/components/DesktopPublishWindow.mxml