ferranrecio c997f91db6 MDL-80191 backup: add subsections to backup form
The patch adds two new levels to the backup form structure: subsection
(a delegated section which parent is a course module) and subactivity
(an activity inside a subsection). Those new elements are displayed as a
inner section below the parent activitiy.

For now the UI is the same as a regular section but future issues will
define how the UX should be. The new two levels have their own classes
to represents settings and have extra dependencies.
2024-07-01 10:48:32 +02:00
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