Add: Added Tray option to recall last Popup message

Add: Added Tray option to reset tray icon to default (even when unread mail exists)

Add: New menu to explicitly set Exchange Server version

Add: Added 'Server\User' to Tray tooltip

Add: Added Tray option to Open Outlook

Mod: Namespace refactoring

Mod: Code cleaned up & restructured

Mod: Allows maximum of 1 hour for Update Interval (was 60 secs)

Mod: Improved error checking on input fields

Mod: 'Restore' changed to 'Options' on Tray menu

Mod: Separators added to Tray menu