keyman events
beforekeyboardchange- Called when keyboard input language about to change.
controlblurred- Called when input element loses focus.
controlfocused- Called when input element receives focus.
keyboardchange- Called when keyboard input language changed.
keyboardloaded- Called when keyboard code loaded.
keyboardregistered- Called when keyboard 'stub' processed (for listing as available keyboard).
loaduserinterface- Called when allow ui initialization.
unloaduserinterface- Called when allow ui clean-up.
