General image drafting improvements, etc.
It looks like I can't add images to existing drafts if they already contain images. Firefox 102.0.
Steps to reproduce:
Create a post
Upload 1-4 images
Save as a draft
Edit the draft
Upload a new image (deleting one if need be)
Save the draft
The draft saves with the new image.
The post hangs indefinitely with "Starting..." over the image.
In console, I get an error on hitting save draft:
Uncaught (in promise) TypeError: n.data[t] is undefined