1. When the tag suggestion list is open, I expect the Esc key to close it.
2. Also, when the suggestions are closed, I expect the Enter key to submit the changes.

What in fact happens is that Enter has no effect and Esc cancels the dialog. I assume this is in part due to the hybrid of a React control (tags input) and Angular modal. But once we move to only React in this area, we should revisit the UX.