Imported older news

Bug fix: 'Delete', 'Next' and 'Previous' on Message Read screen now
correctly obey the search criteria from the mailbox screen
Clicking on the / and / on a sorted column heading would remove the
current sort, and potentially fall back to the default sort. This
was confusing behaviour so now clicking on / or / is the same as
clicking on the column heading text.
Bug fix: Some screens were incorrectly being shown as sorted by a
field when they weren't really
Bug fix: You can now change the default signature
Bug fix: 'Preview' mode now correctly works as specified for 'All'
or 'Unread'. Previously it was only working for Unread messages
Bug fix: Folder synchronisation now works properly. Folders created
or deleted with an external IMAP client client appear/disappear when
logging in or going to the Folders tab on the Preferences screen
Changed window title to folder name in Mailbox screen. This seems
more useful
Clicking 'Edit' on the Compose screen now resolves all nicknames to
full email addresses before going to the Edit Addresses screen