Before this change when moving a section via drag and drop the
aria-label for the section was not being updated neither was the
title on the drag handle.
The result was the the drop menu on keyboard drag and drop displayed
the wrong information after a section was moved.
When using section drag and drop, the topics and weeks formats expected
the '.section_add_menus' element to be present so it could update it on
section drop. Due to MDL-68056, this control is only sometimes present.
This has been updated to conditionally swap to address this.
Creates a new method of handling all the section related icons.
Including a new method that places these actions in a menu for topic and
weeks course formats. (This version replaces "Edit" with "Topic/Week/or
Section menu")
Initially, the default section title was swapped within the course format
javascript functions. Though some section titles may be custom and does not
require swapping, in addition they may have links to single section view. This
introduces some callback functions for define what needs to be done in
sections libs and js files.
It allows to define M.course.format.swap_sections and
M.course.format.get_section_selector in the course format javascript file, so
that course dragdrop is aware about perculiar layout and changes that need to
be done when sections are swapped.
Sara Arjona