Sharing: Add names to the secret token of the link

[Alejandro18650]

It is useful to share many albums with only one link. This can be done with the same secrets as @rom4nik said in #1162. The problem is that it is difficult to distinguish the different secrets.

I think we should add a name or description for the secrets of the secrets.

[lastzero]

You can change them to something you remember. Would this help?

[kevincox]

I have been working around this by appending a "note" to the secret token like abc123-dad but I would prefer to have this hidden from the recipient.

A separate file like "notes" that is optional and default empty would be very convenient. It would also be nice because it can be updated after sharing without invaliding the link.