Autocomplete (Combobox demo): Set the button type to button to preven…

…t form submission. Fixes #6755 - Autocomplete: The combobox "show all" button submits forms.

demos/autocomplete/combobox.html

@@ -82,7 +82,7 @@
 						.appendTo( ul );
 				};
 
-				this.button = $( "<button>&nbsp;</button>" )
+				this.button = $( "<button type='button'>&nbsp;</button>" )
 					.attr( "tabIndex", -1 )
 					.attr( "title", "Show All Items" )
 					.insertAfter( input )