Reminders are available on both received and sent mails.

This is a new, redesigned, but limited version.

To get the the addon working after Tb restart, go to addon manager and unactivate/activate it [**to be fixed**]

It is limited to one unique feature : ability to set a deadline to a mail. The mail is tagged in green until 3 days before the deadline, in orange then, and in red when deadline expired.

To set a deadline, select the date in the datepicker box on right side.

To unset a deadline, simply choose a date before or equal to today.

Thanks a lot for reviewer who helped a lot.

Brand new restartless version.

Version 0.8.8 :
- added soon and expiry date on the message header view, rather than with tags
- cleanup of the code by wrapping variables (but still does not fully pass the validation, although there is no global variables... ?)

Bug fixes
Manage to get the last reminder only as pending whjen reminder is sent over a pending message (ok this sentence is not so clear, but this is it !)
Added tags for expiration date (thanks to Amulya Khare, Follow-Up extension author)