saveTranslation method saves original message and triggers validation (and save???) on all linked translations

It may cause performance issues: https://bitbucket.org/atlassian/atlassian-translations/src/4bab53b78d75226cc066a68c285fa6315f01b8c1/tac-website/grails-app/services/translate/TranslationService.groovy?at=master#cl-445

Possible solutions:

• uncomment originalMessage in TranslatedMessage domain class to make the link bidirectional (so save on translation updates the link and there is no need to save original message). But we are unaware of all consequences of this bidirectional link: https://bitbucket.org/atlassian/atlassian-translations/src/4bab53b78d75226cc066a68c285fa6315f01b8c1/tac-website/grails-app/domain/translate/TranslatedMessage.groovy?at=master#cl-10
• disable deepValidaton for this particular original message save (corresponding translation is already validated and there is no need to validate other linked translations): http://grails.org/doc/2.1.0/ref/Domain%20Classes/save.html