Merge branch 'install_28_STABLE' of https://git.in.moodle.com/amosbot/moodle-install into MOODLE_28_STABLE

When next/back button is pressed in phantomjs/browserkit
it reload page, so adding a bug_phantomjs, so that we can
test the lesson re-attempt scenario

This patch fixes the problem of client validation being broken when
shortforms is not enabled. This issue is caused by moodle-core-event
module not being loaded and the broadcast parameter in the
Y.Global.publish set to 2 instead of true.

It's possible to reach the end of the lesson, get your result,
click back until you get to the last question, answer it correctly
and then be awarded a result of 100%. This was because the grade
calculation would only include the questions answered, rather than
all of them in the lesson. However, you can not fix this by always
grading by the amount of questions in the lesson as some lessons
bypass certain questions depending on the answer to previous ones.
The minquestion setting can now successfully be used to prevent this
behaviour by rewording the misleading string and adding logic.

The 'startlastseen' flag was removing any previous attempts
the user had from the DB. This meant that the user could
simply re-answer the question, regardless of the number
of attempts allowed.

It was possible in the lesson module for a user to
answer a question, get the result, then click back
in the browser and re-answer it, even if they exceeded
the number of attempts allowed per question.

Ankit Agarwal authored Jun 08, 2015 and Eloy Lafuente committed Sep 09, 2015

Mainly to verify groups visibility this new callback has been created.

Note this was originally 2 commits but for amending purposes they have
been squashed.

Thank you to Ann Adamcik for providing this patch.

Without it, transactions are executed in standard READ_COMMITED
mode, without snapshoting/row versioning, leading to update
conflicts under high concurrency.

Without it, transactions are executed in standard READ_COMMITED
mode, without snapshoting/row versioning, leading to update conflicts
under high concurrency.

Adrian Greeve authored Aug 25, 2015 and Dan Poltawski committed Sep 07, 2015

We want to remove the managefiles button from the
editors in the wiki so that students don't delete
each others files.

This is to ensure we have other window closed
so there is no race-around condition

Merge branch 'install_28_STABLE' of https://git.in.moodle.com/amosbot/moodle-install into MOODLE_28_STABLE

David Monllaó authored Sep 03, 2015 and Eloy Lafuente committed Sep 03, 2015

Conflicts:
	lib/upgrade.txt

Ryan Wyllie authored Sep 03, 2015 and Eloy Lafuente committed Sep 03, 2015

Updated the help text on the theme settings page to
mention that the theme logo will only be displayed on
the front page and login page.

An invalid format is casted to 0 (if a string) or to some truncated value in other cases (ex: 10..5).