OO-2748: check assessment entry visiblity for show results, init the whole thing after suspend and cancel too

OO-2740: remove the email of the person leaving the group from the email to the person gaining access to it (patch S. Clemenz)

OO-2722: hardened check of the forum resource against null, only check if the user is owner if the message is really hidden

OO-2708: update qtiworks to 1.0.3, add validation to FIB and hottext editors, fix an issue where a gap text alone in a paragraph is deleted by TinyMCE