Leopard compatibility

- Chat tabs will now dynamically shrink slightly to avoid creating an
overflow menu.
- Added a preference to always warn when closing a chat window with multiple
tabs.
- Fixed a bug that caused a new Ring sound selection to not take effect until
the next login.
- Fixed a bug that configured the command-key equivalents for Close Window and
Close Tab options incorrectly.
- Fixed a bug that allowed new IM windows to open for contacts that do not
support instant messaging.
- Fixed validation of Invite to Chat menu options for non-jabber id's.
- Fixed a bug that would fail to receive file transfers if the selected
downloads folder was missing.
- Fixed a bug with the Reveal button in the Transfers window.
- Fixed a bug that caused login attempts to fail if the initial attempt failed
due to a network problem.

• Support for correctly receiving private MUC messages
• Support for sending files to people you are chatting with by are not in your contact list
• Added intelligent cascading for incoming file transfer/muc request windows
• Added a menu command for closing individual chat tabs
• Improved jabber ID matching when making an outgoing call via the call number field.
• Fixed a crashing bug that occurred with certain corrupt jabber ID's in a roster (2008)
• Fixed a bug that didn't change the ring sound used by gizmo core until the next login (2061)
• Fixed a bug with the missing calls button on the home tab (2063)
• Fixed cosmetic bugs zooming the main window