- Version update to 4.6.0:
* Added support for tags. These can be locally assigned to the messages.
* Message information are shown in separate window when double-clicking the
message in message list or when hitting the Return/Enter key.
* When composing a message, the recipient can be added to the recipient list
by double clicking it in the recently-used recipient list.
* Information about personal delivery are shown in message description field.
* Fixed problem where account entry has not been updated after message
deletion.
* Fixed encoding issue when exporting correspondence overview in HTML.
* Fixed a bug causing the create message button not to activate when first
account was created.