Today I've noticed a strange bug (or I don't know how to call it) while working on my PHP project (based on CodeIgniter). Standart index.html files in some (but not all) folders (for example /application/helpers/, /application/hooks/ etc) are not shown in the "Folders" tree. When I hit "Refresh folders" in the "Project" menu, the missing files appear but only for this session. Is there a way to fix that? Thank you in advance.