Set of icons for attachments

[tessus]

@bsouthern

Yes please, this black J icon that proceeds each file attachment doesn’t serve an any purpose and looks bad.

see my answere here

New icon for Joplin!

It shows that the link points to a local document/resource. I certainly want an indicator like that. It doesn't have to be this partiular icon, but something that shows me that it is a local link.