MDL-32444 theme_afterburner: adds 5px margin to the left of #loginbtn, input, button, select in /style/afterburner_styles.css

The signature of mod_workshop_mod_form::validation() is now compatible
with that of moodleform_mod::validation() even though the parent's
declaration sucks. No one can choose their parents.

Based on http://commons.wikimedia.org/wiki/File:Appointment-new.svg
(public domain Tango! Desktop Project icon)

Note that most line changes in the patch are caused by the recent
changes in the XMLDB TEXT fields handling (no size specified now) and by
the change in the indentation.

AMOS BEGIN
 CPY [allocationsettings,workshopallocation_random],[randomallocationsettings,workshopallocation_scheduled]
AMOS END

Removing the table "scheduled" created by the XMLDB by default (it's a
bug in XMLDB, I'm just too lazy now to fix it). Adding new fields to
hold the result of the most recent execution.