Emoji not accepted in subject lines, for either saving templates or sending the emails #529
Description
When sending emails as the survey author, using emoji (e.g. 🐴) in the Subject line always results in an unexplained and instant error. It also causes saving email templates to fail.
This took a long time to recognise as there is no error text to explain it. If EUSurvey is unwilling to offer emoji in subject lines, there should be clear errors to indicate this. It should also be a 'soft reject' (i.e. keeping you on the same page) instead of a hard error as the error causes you to lose the text entered in the email if it was not saved.