Fix tab glitch when tabing from and to an autocomplete field, which r…

…esulted in a dropdown that didn't open on first character when returning to the field (#1039)

Co-authored-by: Erik Strid <[email protected]>

wicket-extensions/src/main/java/org/apache/wicket/extensions/ajax/markup/html/autocomplete/wicket-autocomplete.js

@@ -102,7 +102,11 @@
 				//workaround for IE. Clicks on scrollbar trigger
 				//'blur' event on input field. (See https://issues.apache.org/jira/browse/WICKET-5882)
 				if (menuId !== document.activeElement.id && (menuId + "-container") !== document.activeElement.id) {
-					hideAutoCompleteTimer = window.setTimeout(hideAutoComplete, 500);
+					hideAutoCompleteTimer = window.setTimeout(function() {
+							hideAutoComplete();
+							isTriggeredChange = false;
+							triggerChangeOnHide = false;
+					}, 500);
 				} else {
 					jQuery(this).trigger("focus");
 				}