Distinguish between left and right keys and enable KeyBindingManager only when right Alt key is not pressed
Make changes for review feedbacks and remove `setEnabled()`  API that was added as a hack before.
Update comments to be more accurate.
Reimplement the AltGr keydown detection.
Use enum for ctrl keydown states. Fix one unit test failure and add another one that simulate Ctrl and Alt keys down.
Fix an issue with AltGr key detection after a Ctrl shortcut execution. Also add a unit test for this case.
Fix the AltGr key detection following a control shortcut issue again.
Merge pull request #10109 from adobe/rlim/altGr-key

Disable KeyBindingManager on right Alt keydown.