"Person" avatar is mandatory
Is your feature request related to a problem? Please describe
I tried to add an Person which is the author of a book that is being narrated. I do not have am image of that author. However when creating a new "Person", uploading a 400x400 avatar is mandatory in order to proceed. I quickly created a white 400x400 image as a workaround which does not look nice.
Describe the solution you'd like
Having avatar being optional and displaying a placeholder image for a person (or no image at all?) in case there is none. Also, they 400px size is a hard requirement. Sometimes, I only have a smaller image and it would be great if it would not totally fail with it. It could warn about a suboptimal experience if I upload a smaller image and let me proceed anyway.
Describe alternatives you've considered
If I used castopod for longer I would create such a placeholder image myself, but I would need to have it locally stored on all computers that I use, and given my graphics skills it would look ugly :).