Some bugfixes, documentation improvements minor features; some internal rework.
- add --format=json2 for
mu find, which produces a bit more 'idiomatic' json - close notifications once done
- more informative mu4e-analyze-last-query (include all parameters)
- Make mu4e-maildir-shortcut and mu4e-bookmarks understand a property
:hide-if-no-unread, which hides the maildir/bookmark from the main-view
if there are no unread messages which the corresponding query.