The “flagged-mail-feature” is great and is an essential feature in my daily workflow. Mails can be moved from the inbox and still be tracked. What bothers me is that you can’t tell at first glance in which folder the mail is located. This would be a great extension, if you could see this directly or at least jump to the respective folder via context menu (similar to e.g. the Windows search).
Greetings, Frank