Bug 1868865 - Extend browser_rightClickMiddleClickFolders test timeout. r=aleca

Differential Revision: https://phabricator.services.mozilla.com/D195813

--HG--
extra : amend_source : 01e2d59d9067670227d0ce43167ea946882a3bf3
extra : absorb_source : a9e1e206574bc7309127277b17011178ecb1ba83

mail/test/browser/folder-display/browser_rightClickMiddleClickFolders.js

@@ -9,6 +9,8 @@
 
 "use strict";
 
+requestLongerTimeout(2);
+
 var {
   assert_folder_displayed,
   assert_folder_selected,