(define-key map "t" 'notmuch-search-filter-by-tag)
(define-key map "l" 'notmuch-search-filter)
(define-key map [mouse-1] 'notmuch-search-show-thread)
(define-key map "t" 'notmuch-search-filter-by-tag)
(define-key map "l" 'notmuch-search-filter)
(define-key map [mouse-1] 'notmuch-search-show-thread)