Handling uploaded files that didn't make into the declaration

[tareq89]

Right now, in the image upload component, when selecting an image, we immediately upload that image to minio. Then, based on the draft and final submitted action, we delete or keep the reference, according to this change

But if we do this:

1. Select an image, it gets uploaded to the server
2. Delete the image, according to this change, now we only remove the image reference from frontend, not actually delete it in the backend.
3. Save and exit, this action gets saved as a draft=true
4. Come back to this draft again, now, go ahead and submit
5. Previously uploaded image, which did not make it to the draft, doesn't get deleted