I don't keep my data on all the time, so I often see the Textra notification at the top of my phone that I have an MMS waiting to be downloaded. The problem is that if I accidentally dismiss that notification, I can't tell who sent it to get it back. I'd love to have that MMS waiting message show up as a part of the actual conversation with the person who sent it to me, so I could download it later and not have to worry about the Android notification disappearing forever.