5.0 Beta 10 Released

This version has some speed improvements for various IMAP commands, especially for larger inboxes. It also adds a few user requested features: find/search for preview window, support for MMS and SMS emails, and an option to auto-close preview windows when you close the main window. Bug fixes include certain attached/embedded pictures not loading in the preview widow, rules not having "custom" color available for tray notification color, and some other work on the rules code.