$.context has been deprecated for a long time - since before this code was
written. Unfortunately jQuery does not emit anything for deprecated code so
this was not picked up sooner.

This reverts commit fa57043e, reversing
changes made to 36a19ecc.

Conflicts:
	lib/upgrade.txt

Mustache JS helper can overwrite JS blocks when using nested templates.

Each call to render should have it's own scope.

This commit just:

- Moves the null => '' to better place, restricting it to PHP >= 7.0
  (bug https://bugs.php.net/bug.php?id=72524)
- Adds a couple of notes here and there.
- Changes some small details to keep the file using the same coding.

Set the focus on button to ensure it is in
viewport before clicking on it.

Conflicts:
	version.php

Conflicts:
	lib/upgrade.txt

Steffen Pegenau authored Jul 18, 2016 and David Monllaó committed Jul 18, 2016

To make the creation of dropzones easier, the mouse coordinates are shown.

Conflicts:
	mod/assign/externallib.php