Add-on store: display author and add-on id in details (#15160)
Raised in #14912 (comment)
Summary of the issue:
A user may wish to discover the internal ID of an add-on.
For an add-on installed from the datastore, both publisher and author fields can be displayed.
Description of user facing changes
Display the add-on ID in the details panel.
Show the "author" field for add-ons installed from the datastore.
