#92 Error text advises to use Anonymous instead of "uncredited"

[Ahasuerus]

When editing an existing Publication via Publication Editor, if you delete the Author's name, you will get the following error: "Every publication must have an author. If you have intentionally left the author field blank, use "Anonymous" to indicate unknown authorship. " This was changed in Help years ago, so the error text needs to tell the users to use "uncredited" if there is no author edit in the book.

[Ahasuerus]

Fixed in edit/submitnewpub.py 1.7, edit/submitpub.py 1.6, common/library.py 1.10

[Ahasuerus]

Implemented in r2009-17.