Update sidebar-autocomplete.js

In addition to this pull request:
ThemeFuse#20

Fix for authocomplete in the search form for "specific pages" tab

Author: yura-x

static/js/sidebar-autocomplete.js

@@ -28,7 +28,7 @@
 
 						if (data.data.items.length === 0) {
 							response({
-								label: noMatchesFoundMsg
+								label: noMatchesFoundMsg.noMatchesFoundMsg
 							});
 						} else {
 							response( $.map( data.data.items, function( val, index) {