Use anchor in supplier regex (#3402)

Adding a unit test to check the url patterns allowed/disallowed would be a good idea. I should practice what I preach.

application/hooks/method_hook.php

@@ -5,7 +5,7 @@ function validate_method()
 
     $url = $_SERVER['REQUEST_URI'];
 
-    $post_required = preg_match('/(save|delete*|remove*)\/?\d*?/', $url);
+    $post_required = preg_match('/\/(save|delete*|remove*)\/?\d*?/', $url);
 
     if($post_required && $_SERVER["REQUEST_METHOD"] != "POST" && empty($_POST))
     {