Provide a better way to map to a display key.
Merge remote-tracking branch 'origin/master' into rlim/display-key-issue

Conflicts:
	src/command/KeyBindingManager.js
Call regexp only once when chacking for display key.
Fix the unit test failure caused by processing an invalid key.
Merge pull request #9673 from adobe/rlim/display-key-issue

Provide a better way to map to a display key.