Fixed manager documentation inaccuracy

List ed 1.6.x releases in descending order

Thanks Michał Pasternak.

Thanks Bouke Haarsma for report, fix and initial patch.

Thanks Loic Bistuer.

Detect and use the services of the ANSICON third-party tool if it's
available.

Thanks Tim Graham for the report

Fixed #21545 -- autoreload kqueue events weren't cleared which caused an infinite loop.

This code seems to be an artifact of AdminMediaHandler removed in [5c53e306].

Thanks jared_mess for the report.

Thanks svartalf for the report.

Faulty line was introduced in 50a8ab7c.

Thanks Rémy Hubscher, Ramiro Morales, Unai Zalakain and
Tim Graham for the reviews.
Also fixes #16084.

Refs #20199 #16986.

Thanks @akaariai, @bmispelon, @mjtamlyn, @timgraham for the reviews.

Previously when collecting static files, the directories would receive permissions
from the global umask. Now the default permission comes from FILE_UPLOAD_DIRECTORY_PERMISSIONS
and there's an option to specify the permissions by subclassing any of the
static files storage classes and setting the directory_permissions_mode parameter.

Use 'update_fields' in RelatedManager.clear() when bulk=False.

Thanks Simon Charette for the suggestion.

Refs #21169.

Thanks Rhett Garber for the report and initial patch.

Thanks to trac user oubiga for the report.