Sometimes it is possible that a user is presented with the profile
edit form, but is in a state where they are not considered fully
set up (one example is when a site is installed using the CLI script)

In these cases the filepicker gets upset when the user tries
to upload a profile picture.

This patch simply disables that field in these cases and replaces it
with an error message explaining what's wrong.

It was an unstyled list of links. This changes it to tabs with sub-headings.

We should complete the deletion process using the same
user that started it.

Added a new param to loginas() to prevent the event to be generated as
there is no need to generate an new event for that as the user didn't
explicitly loginas again.

Added a unit test for checking that calendar_get_events
will only return events for activated activities.

calendar_get_events now checks for disabled activities
and only shows events for active modules.

On windows shorter than 670px reduce the height of the message area.

Lesson is using the searchselector which only supports JS - so some
tests need javascript tags.

Also fixed support for filling a passwordunmask field with JS enabled by
id.

there is already logic to determine whether html5 is supported;
otherwise we may end up with nested <audio> or <video> tags

The renderer now uses the $CFG->admin setting in the
require_once call.