Make most of the popup windows closable using keayboard ESCAPE button.

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

bigbluebutton-client/locale/en_US/bbbResources.properties

...ton-client/src/org/bigbluebutton/common/IKeyboardClose.as

bigbluebutton-client/src/org/bigbluebutton/core/PopUpUtil.as

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

...-client/src/org/bigbluebutton/main/views/BBBSettings.mxml

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

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

...nt/src/org/bigbluebutton/main/views/FlashMicSettings.mxml

...-client/src/org/bigbluebutton/main/views/GuestWindow.mxml

...client/src/org/bigbluebutton/main/views/LockSettings.mxml

...client/src/org/bigbluebutton/main/views/LogoutWindow.mxml

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

...-client/src/org/bigbluebutton/main/views/MainToolbar.mxml

...ient/src/org/bigbluebutton/main/views/WebRTCEchoTest.mxml

...rg/bigbluebutton/modules/layout/managers/LayoutManager.as

...src/org/bigbluebutton/modules/layout/views/AddButton.mxml

...bigbluebutton/modules/polling/views/PollChoicesModal.mxml

...uebutton/modules/present/ui/views/FileDownloadWindow.mxml

...tton/modules/sharednotes/views/SharedNotesNameWindow.mxml