If no pinning service is configured, display the IPFS hash for images

[asgeir-s]

If a user has not configured a pinning service, we should display a warning something like:
"Here is the hash of the image you uploaded, since you have not configured a pinning service you need to pin this hash yourself in order for the image to load for other users." and display the hash.

The easiest is probably a modal, @cedricwaxwing?

[cedricwaxwing]

Yeah a modal makes sense here. Is there some way we can validate when the hash is pinned? Ideally we just disabled publishing until this is done (if I'm understanding this correctly).

[asgeir-s]

Yeah a modal makes sense here. Is there some way we can validate when the hash is pinned? Ideally we just disabled publishing until this is done (if I'm understanding this correctly).

I don't think that's something we can easily or should validate since it's not a strict requirement. It's just that the images they upload might not be retrievable, however, all text content will be available. So I don't think we should disable publishing. It's more like "If you want to make sure that your readers can see the image you uploaded, then pin this hash manually".

We should probably also prompt users to add a Pinning Service again in the modal.

[juliopavila]

handled #238