Improvements

• Option to compact folders on exit from now always depends on the total size of deleted messages, which is configured separately and is by default 50%. So, only if more then half of the message base size is occupied by deleted messages, compacting folder on exit takes place

Fixes

• Address Book entries with no email addresses were not excluded from address auto-completion
• Message search function did not perform server-side IMAP search; only local cache have been scanned
• IMAP Folders could be presented as linear structure at first load even when there were some branches