notmuch: Fix auto_tag=yes for modify-labels* and quasi-delete

When 'auto_tag' was 'yes', <modify-labels>* and <quasi-delete> still only
applied to the currently-selected message. Now they apply to all tagged
messages, as they should.
Merge branch 'auto_tag' of https://github.com/tsto/mutt-kz

* 'auto_tag' of https://github.com/tsto/mutt-kz:
  notmuch: Fix auto_tag=yes for modify-labels* and quasi-delete