Add details to the map/animation download processes decorators

Description

The page "Rendered map/animation download processes" cites the decorators but does not provide much info about them.
I'm create up a pull request once I have a JIRA code.

Environment

None

Assignee

Unassigned

Reporter

Gnafu

Triage

None

Fix versions

None

Affects versions

Components

Priority

Medium
Configure