Log Message:
Update to sylpheed-3.0.2. Changes:
* The random scrolling problem on selecting folders with GTK+ 2.12 or later
  was fixed.
* The problem that config files are not updated after creating new accounts
  was fixed.
* The problem that folder config file was not updated after changing IMAP
  or News account name was fixed.
* Several typos in some dialogs were fixed.
* The Japanese manual was updated.