Automatically generated installer lang files
Merge branch 'install_master' of git://git.moodle.org/moodle-install
weekly release 2.7dev
MDL-43267 Javascript: Improve accessibility of keyboard move

Change the keyboard move descriptions to allow for more detailed
descriptions such as:
* "After 'X'"; or
* "To top of section 'Y'"
MDL-43267 Javascript: Remove aria drag/drop related attributes for drag/drop

Since we provide an alternative interface rather than describing the
locations for each drop, we should not add aria-grabbed, or
aria-dropeffect.
MDL-43267 Javascript: Improve focus before and after drag/drop