On IE9+ clicking a Button (with the mouse) to open a Dialog and then closing the Dialog doesn't refocus the Button, due to the async nature of the focus event.   But I don't think we should be guaranteeing refocus except when the Dialog was opened via keyboard (tabbing to the Button and then pressing ENTER/SPACE).   So changing the mouse test to not check for Dialog refocus.   Refs #16926.

git-svn-id: http://svn.dojotoolkit.org/src/dijit/trunk@31089 560b804f-0ae3-0310-86f3-f6aa0a117693
(cherry picked from commit ad8a64b8e9390981c8fae585889b1aefd607cd60)

Conflicts:
	tests/robot/Dialog_mouse.html