* [bug] Fixing handling of modifiers completion
* [bug] Fixing parse_error message retention
* [bug] Fixing size selection error when using only maximum size
* Removing exception StoreNotLoaded
* Making 'cat_message' command dynamic in Mail objects
* Implementation of the "long" output format
* Implementation of mail queue summary
* Implementation of Mail.show() method
* Implementation of selection by queue IDs
* Improved unittests