Fix logbook list bullets with 2+ spaces
* lisp/org-agenda.el (org-agenda-get-progress): Accept multiple spaces
between the list bullet and "State" in the state-change regexp.
Previously, logbook list entries with more than one space between the
bullet and the beginning of the entry would be ignored. I.e., if
a bullet is defined in org-list-two-spaces-after-bullet-regexp, two
spaces will be inserted after the bullet, and that prevents
state-changed entries from appearing in the Agenda Log Mode view.