Dialog: Update to 96e5c24 - keyup apparently doesn't work like I thought it would everywhere, switching back to keydown.

(cherry picked from commit dfe75e1)

Author: gnarf

tests/unit/dialog/dialog_tickets.js

@@ -14,7 +14,7 @@ asyncTest( "#3123: Prevent tabbing out of modal dialogs", function() {
 
 	inputs.eq( 1 ).focus();
 	equal( document.activeElement, inputs[1], "Focus set on second input" );
-	inputs.eq( 1 ).simulate( "keyup", { keyCode: $.ui.keyCode.TAB });
+	inputs.eq( 1 ).simulate( "keydown", { keyCode: $.ui.keyCode.TAB });
 
 	setTimeout( checkTab, 2 );
 

ui/jquery.ui.dialog.js

@@ -330,7 +330,7 @@ $.widget("ui.dialog", {
 
 		// prevent tabbing out of modal dialogs
 		if ( options.modal ) {
-			uiDialog.bind( "keyup.ui-dialog", function( event ) {
+			uiDialog.bind( "keydown.ui-dialog", function( event ) {
 				if ( event.keyCode !== $.ui.keyCode.TAB ) {
 					return;
 				}