Restore the unread messages count to bottom of page

[jim_neely]

There used to be a count of unread messages on the bottom of the page.  It would be nice to be able to turn that on or off.  

The count of messages moved to trash is useless.

[Jon]

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[Agentvirtuel]

Hello

In addition
https://connect.mozilla.org/t5/ideas/thunderbird-number-of-selected-emails-in-the-statusbar/idc-p/43...