Log Message:
Changes 0.9.9:
* the Icon Theme selector has been moved to the other preferences
  window, '/Configuration/Other Preferences.../Display/Themes'. It
  has also been completely redesigned and now displays the name of
  the theme, the name of the author, the related URL, the current
  status, and a preview of the theme.  A theme can be installed or
  removed using the respective buttons.

* the 'External Command' options have been moved to other
  preferences window, '/Configuration/Other Preferences.../Message
  View/External Programs', options for audio player and image viewer
  have been added.

* the creation of 'SMTP only' accounts is now possible.

* the size and position of the Compose window is remembered

* GnuPG: on checking a signature if the key is untrusted the
  signature icon displays a pen with an exclamation mark as a
  warning.

* the SpamAssassin and Clam AntiVirus plugins now indicate their
  operation via the status bar.

* updated translations: French, German, Polish, Serbian, Simplified
  Chinese, Spanish,and Slovak

* Bug fixes