Chrome: test failure in Editor_LinkDialog.html

[Douglas Hays]

Run dijit/tests/editor/robot/Editor_LinkDialog.html in Chrome 8. Resize the browser window horizontally until the first sentence just fits on one line. Rerun the tests and you get 1 failure:

failed with hint:
Verifying insert did not occur in the top li (IE test for selection restore.)
FAILED test: Image Tag: Create a new image

The problem is that the previous Insert Link dialog remained on the screen and clicking the editor white area ended up clicking the dialog instead and thus focus was messed up.

[Douglas Hays]

(In [23337]) Fixes #12079. Adjusted test timings and canceled the insert link/image dialog programmatically after a double-click.