[Core][Edge Web Fonts Terms of Use]: The link Terms of Use cannot be opened by keyboard key.

[julieyuan]

Steps:

1. Launch Edge Code and open index.html file.
2. Click the EWF icon on the right sidebar to bring this Edge Web Fonts dialog.
3. Press Tab key and it will focus the link Edge Web Fonts Terms of Use.
4. Press Enter key.

Result:
The dialog closes and nothing happen.

Expected:
The webpage related to the link should be opened and the EWF dialog is not closed.

ENV: MAC10.9 and Win8(x86) English OS
Build: 0.97.0-359084144(GM)

Notes:
It works well by clicking this link. Maybe this issue relates to issue adobe/brackets#6195.
For Edge Code Preview6, this link won't be focused by pressing Tab key.

Snapshots:
Please refer to snapshots for details:
step3: