Add jQuery BlockUI plugin to hook

modules/misc/unblockui/command.js

@@ -0,0 +1,11 @@
+//
+// Copyright (c) 2006-2015 Wade Alcorn - wade@bindshell.net
+// Browser Exploitation Framework (BeEF) - http://beefproject.com
+// See the file 'doc/COPYING' for copying permission
+//
+
+beef.execute(function() {
+  $j.unblockUI();
+  beef.net.send('<%= @command_url %>', <%= @command_id %>, 'result=command sent');
+});
+