Correction : There are no condition in Models. But the new 'condition' detection finc a condition.
It's OK in 2.05 : we can remove the text in equation.

In 2.05, addinf a new $data:
$eqrow['conditions_number'] = Condition::Model()->count("qid=:qid", array('qid' => $qid));
and test if >0.

in 2.00:
$aData['bRelevanceReadOnly']= Questions::model()->hasConditions($aData['qid'])>0;

But seems Questions::model()->hasConditions broken:
It return allways one if i don't make error:

return self::model()->count('qid = '.$iQuestionID);
is same than
return Question::model()->count('qid = '.$iQuestionID);

Questions::model()->hasConditions broken: confirmed: add a new question : can not edit condition :)

PS: think Questions::model()->hasConditions must return TRUE if there are Expression in Relevance too.

Return FALSE only if this relevance return allways true (empty or 1 for start).

Thank you! Dumb me!