Revert changes from blueimp#3405.

blueimp · blueimp · commit ea144092bd96 · 2015-07-07T10:27:28.000+02:00
Thanks to @dbrugne for the compatibility issues report.
diff --git a/js/jquery.fileupload.js b/js/jquery.fileupload.js
@@ -18,7 +18,7 @@
         // Register as an anonymous AMD module:
         define([
             'jquery',
-            './vendor/jquery.ui.widget'
+            'jquery.ui.widget'
         ], factory);
     } else if (typeof exports === 'object') {
         // Node/CommonJS:
