EmailProcessor.php script - fix handling of multipart/alternative content type

User files an email via EmailProcessor. When viewing the email it displays all the multipart/alternative sections as well, which are unreadable when displayed on the form. The EmailProcessor correctly handles multipart/mixed, i.e. the attachments and such, but for multipart/alternative it is storing all the parts in the details field.

Dave D's recommendation is to either store all content of this type BUT only display text part, OR only store text part and attachments (whichever is easier). Check with him if you have questions etc.