Add a new permission to hide the dial string from admins by default.

app/extensions/app_config.php

@@ -69,6 +69,9 @@
 		$apps[$x]['permissions'][$y]['name'] = "extension_user_delete";
 		$apps[$x]['permissions'][$y]['groups'][] = "superadmin";
 		$apps[$x]['permissions'][$y]['groups'][] = "admin";
+		$y++;
+		$apps[$x]['permissions'][$y]['name'] = "extension_dial_string";
+		$apps[$x]['permissions'][$y]['groups'][] = "superadmin";
 
 	//schema details
 		$y = 0; //table array index