fixed a couple of accessibility bugs in 1.0

...uebutton-client/branding/default/style/css/BBBDefault.css

bigbluebutton-client/locale/en_US/bbbResources.properties

bigbluebutton-client/resources/prod/BigBlueButton.html

bigbluebutton-client/resources/prod/lib/bbb_blinker.js

...client/src/org/bigbluebutton/main/events/ShortcutEvent.as

...c/org/bigbluebutton/main/views/CameraDisplaySettings.mxml

...n-client/src/org/bigbluebutton/main/views/LoadingBar.mxml

.../src/org/bigbluebutton/main/views/ShortcutHelpWindow.mxml

...ent/src/org/bigbluebutton/main/views/VideoWithWarnings.as

...c/org/bigbluebutton/modules/chat/views/AddChatTabBox.mxml

...nt/src/org/bigbluebutton/modules/chat/views/ChatView.mxml

.../src/org/bigbluebutton/modules/chat/views/ChatWindow.mxml