Focus returns to Desktop Sharing button when DeskShare window closes.
Focus returns to Webcam button when Webcam window closes
Focus returns to Shortcut Help button after Glossary window closes. when the Glossary OPENS, focus moves to the titleBarOverlay as with all other module windows.
Focus moves to the Mute/Unmute button when the mute toggle shortcut key is used
Merged upstream/master.
Merge pull request #152 from SenecaCDOT-BigBlueButton/global-hotkey-focus-fix

Global hotkey focus fix