Update jquery.fileupload.js

Author: krisf

app/assets/javascripts/jquery-fileupload/jquery.fileupload.js

@@ -125,7 +125,7 @@
             limitMultiFileUploadSizeOverhead: 512,
             // Set the following option to true to issue all file upload requests
             // in a sequential order:
-            sequentialUploads: false,
+            sequentialUploads: true,
             // To limit the number of concurrent uploads,
             // set the following option to an integer greater than 0:
             limitConcurrentUploads: undefined,