Version 1.07 beta 2 - Added a way to select multiple messages in the message list and batch-delete selected messages (only if permissions allow deleting all messages).  This is most useful for personal mail when a user gets a lot of spam messages.  In the lightbar message list, the spacebar selects individual messages and CTRL-A is used to select/de-select all messages.  In the traditional UI message list, the S key is used for message selection.  CTRL-D then does a batch delete of selected messages in the message list.  The spacebar can also be used to select a message when reading it.

This is marked as 'beta', but I have tested the new features and they appear to be working as intended.  I will likely release a non-beta soon.