=== Test 'enter' key is not bubbling ===
 1. Open 'Link' dialog;
 1. Enter a url and press 'Enter' key;
 * Expected Result: Dialog closed with link inserted( There's no failed prompt );
 1. Open 'Link ' dialog again;
 1. Press 'Tab' until focus on the 'Ok' button, then press 'Enter' key;
 * Expected Result: The result should be the same as above.