Make it possible to edit a conversation starter image.

[AlertBri]

Currently, it's possible to edit a conversation starter, and to delete the associated picture, but not possible to upload (or request a regeneration) of a new picture to go with the post.

[SimonHeese]

Editing would be great. Also in my case the add an image function is broken.
The overlay with the gallery is not visible, only a transparent black overlay. However when taking a screenshot the gallery is there.

Moto G82 5G with Android 13