For selective publishing dropdown the author tile background is not consistent

So for an author like this, this is not a problem, because the avatar is used:

                      owner:
                        name: Garrett Bobby Ferguson, Jr
                        avatar: /sites/default/files/user-pictures/garrett.jpg
                        uri: /user/12
                        id: 12

But for an author like this, it is a problem:

                      owner:
                        name: Garrett Bobby Ferguson, Sr
                        avatar: null
                        uri: /user/13
                        id: 13

To fix this, we should hash that owner object and use that hash to consistently (deterministically!) generate a color, instead of picking one at random. See https://www.npmjs.com/package/color-hash for example.

One more observation , author title colors vary across different browsers, even when viewed at same time