Pull media out of long text threads. keep the actual texts.

The better half and I have about 2gb of images of our son volleyed between us. I've already saved these images, and if love to clear up the space, but digging back manually and deleting the media messages (are those MMS'?) is a drag.

I'd like to keep the texts (are those SMS'?), but remove the media files.

my phone [LG G4] is starting to show it's age. not blaming that on you guys, but any but can help.