Fix mergeOldAnswers when undefined oldQuestion
Fix naming

No attachment check is done in validation
Fix to not fail if context is not found
Copy answers so that changes to original application do no reflect to Hakemus
Apply only preference part last from given answers
Add in validation also new questions coming from current answers
Do not add new questions from empty hakutoive
Add follow-up questions by validating also after changes in option questions
Update also question errors after validating changes in option questions