Fixed issue 04420 group.php will strip out {QUESTION_ESSENTIALS} if it appears at the very first part of the template
Dev substituted strpos() with preg_match() to fix stripping of {QUESTION_ESSENTIALS}
Dev strip {QUESTION_CLASS} if {QUESTION_ESSENTIALS} is missing
Dev this issue occured in question.php, group.php and survey.php so all have been updated

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey@8909 b72ed6b6-b9f8-46b5-92b4-906544132732