Postbox 3.0.8

- Reduce power usage (and increase laptop battery life) by only using the integrated GPU on Mac OS X
- Added a "Run Filters on Folder" toolbar button
- Notification Center alerts now link directly to messages
- Postbox will now display the account name next to folder name in the message pane
- Added automatic account configuration support for iCloud email accounts
- Fixed a crash on import from Thunderbird
- Fixed a crash on indexing
- Fixed an issue where attachment thumbnails would not display on Mac OS X (Retina only)
- Fixed an issue with Growl integration on Mac OS X
- Fixed an issue where searches on non-recognized Topics would return results
- Fixed issues with "Topic is" / "Topic isn't" criteria for smart folders
- Fixed an issue with automatic account configuration when you entered an incorrect password
- Fixed an issue that would prevent spelling dictionaries from installing