James D. Callahan III:
- Bail out of the SendMail hook if recipient is nil.
- Animation when clicking the expand button. Yay.
- Tweaked horizontal and vertical tooltip cell margins.
- Colored background for headers.
- Colorized mail subjects and colorized expiration times by length (green is OK, red means almost expired)
- Properly clean things up when the tooltip is released.
- Initial commit.