Workaround hang in focus_mouse.html test on IE10

triggered by d26af75.

Starting with that change and only occuring with certain timing,
the onload event on initRobot()'s iframe (created from dojo/robotx.js)
never fires, even though the test_focusWidget.html page has finished
loading and initializing.

Strangely, this problem only seems to happen on tests/_base/robot/focus_mouse.html,
which is a deprecated test superceded by tests/focus.html.  So for now I just removed
the Editor from the test_focusWidget.html.  If we start to see more serious problems,
will need to make a bigger fix, perhaps rolling back
d26af75.

Refs #18715.

tests/_base/robot/focus_mouse.html

@@ -32,7 +32,7 @@
 				doh.register("Dijit focus manager tests", [
 
 					function setUp(){
-						dojo.forEach(["form", "fieldset1", "fieldset2", "select", "editor", "spinner"], function(id){
+						dojo.forEach(["form", "fieldset1", "fieldset2", "select", "spinner"], function(id){
 							var w = dijit.byId(id);
 
 							// old API is to connect to onFocus/onBlur (remove in 2.0)
@@ -119,37 +119,6 @@
 							dojo.disconnect(handle);
 						}
 					},
-					{
-						name: "focus editor",
-						timeout: 4000,
-						setUp: function(){
-							resetEvents();
-						},
-						runTest: function(){
-							var d = new doh.Deferred();
-
-							dijit.byId("editor").focus();
-
-							doh.robot.sequence(d.getTestCallback(function(){
-								// The focus stack should show the Editor plus all parent widgets
-								var stack = dojo.global.dijit._activeStack;
-								doh.is("form, editor", stack.join(", "), "editor stack");
-
-								// _onFocus()/_onBlur was called appropriately
-								doh.f(focusEvents["form"], "form was already focused, no duplicate event");
-								doh.f(blurEvents["form"], "form wasn't blurred");
-								doh.t(blurEvents["fieldset1"], "fieldset no longer focused");
-								doh.t(focusEvents["editor"], "editor focused");
-
-								doh.f(focusedWatchLog["form"], "form watch callback (no new notification)");
-								doh.is("blurred", focusedWatchLog["fieldset1"], "fieldset watch callback, no longer focused");
-								doh.is("blurred", focusedWatchLog["select"], "select watch callback, no longer focused");
-								doh.is("focused", focusedWatchLog["editor"], "editor watch callback");
-							}), 500);
-
-							return d;
-						}
-					},
 
 					// clicking spinner buttons should activate the spinner, even
 					// though there's no actual DOM focus event

tests/_base/test_focusWidget.html

@@ -27,7 +27,6 @@
 		dojo.require("dijit.PopupMenuItem");
 
 		dojo.require("dijit.layout.ContentPane");
-		dojo.require("dijit.Editor");
 
 		dojo.require("dijit._base.focus");
 
@@ -123,9 +122,6 @@ <h3>Widget Focus Test</h3>
 			<label for="plain">a plain input:</label>
 			<input id=plain value=plain/>
 		</fieldset>
-		<div id=editor data-dojo-type="dijit/Editor" >
-			Hello world, this is an <i>editor</i>
-		</div>
 		<br>
 		<label>another fieldset ContentPane:</label><br>
 		<fieldset id=fieldset2 data-dojo-type="dijit/layout/ContentPane">