Fix a collection of stupid !@$#ing bugs in ExtendedValidationGroupForm where fieldsets don't get mactched to inputfilter properly
 - When pulling the fieldset and inputfilter, use the form name not it's index in the collection (they're usually the same thing, but not guaranteed)
 - Do $argv->validationGroup instead of $this->validationGroup
 - Rewrote nukeStrayObjectsFromTheResult during debugging of the aforementioned stupid bug
Fix a number of mismatches between fieldset and inputfilter
CompetitionMatchExtractor shouldn't use the service to extract the entity, as the results there are based on the user's permissions
Wrap up the game events add/remove feature