Provide key-upload-option in subscription form
Often one would start to subscribe an address by entering it into the new-subscription-form and then realise that to assign the fingerprint one needs to upload the key first. We should help with that.
- Either provide a key-upload-field and try to use the result of the import to assign the fingerprint, or
- provide a link to the key-upload-form without leaving the new-subscription-form (popup?) and after successful upload refresh the list of keys in the new-subscription-form.