Merge tag '1flow-0.26.7.2' into develop

0.26.7.2 1flow-0.26.7.2
Refactor and sanitize a little `article.extract_and_set_title()`.
Refresh the display of "bad" articles for staff users.
Circumvent http://dev.1flow.net/webapps/1flow/group/12751/ with a symlink.
version bump for 0.26.7.3.
Merge tag '1flow-0.26.7.3' into develop

0.26.7.3 1flow-0.26.7.3
Merge branch 'release/0.26.7.3'
Fix http://dev.1flow.net/webapps/1flow/group/18495/

It worked with {# … #} before {% extends … %} but not with {% comment %}. Seriously, Django?
version bump for 0.26.7.4.
Merge branch 'release/0.26.7.4'