How can I delete a draft message when it is an attachment and not text? I accidentally selected the wrong contact initially. I'm not seeing a way to delete the draft. There isn't any text to delete. 

I am using Message+ 6.7.12 on a Samsung Galaxy S8.
There is an X on the thumbnails of the attachment. Click on it to remove the attachment. A Message will show "Converted to text message". Click back and the draft should be deleted.