Autocomplete: Clear selectedItem property whenever the user types something. Also updated combobox to clear the select element when clearing the text element. Fixes #5453 - Autocomplete: combobox demo doesn't remove invalid values.

demos/autocomplete/combobox.html

@@ -43,6 +43,7 @@
 							if (!ui.item) {
 								// remove invalid value, as it didn't match anything
 								$(this).val("");
+								select.val("");
 								return false;
 							}
 							select.val(ui.item.id);

ui/jquery.ui.autocomplete.js

@@ -79,6 +79,7 @@ $.widget( "ui.autocomplete", {
 					self.searching = setTimeout(function() {
 						// only search if the value has changed
 						if ( self.term != self.element.val() ) {
+							self.selectedItem = null;
 							self.search( null, event );
 						}
 					}, self.options.delay );