Bug 835149 - [email/IMAP] folder list sync breaks if IMAP server (ex: courier) returns folders in non-hierarchy order.
Merge pull request #117 from asutherland/imap-unordered-hierarchy-fix

Bug 835149 - [email/IMAP] folder list sync breaks if IMAP server (ex: courier) returns folders in non-hierarchy order. r=squib