Improve Genres field in Table View to avoid truncating to single letters

[dontpanic-13]

Currently if a book has a lot of genres assigned and/or if the column is narrow the genres are truncated to a single letter. This is not very usable and it would be better to show the full genres that the column width would allow.

For example: Cyberpunk,Thriller,Espio...
instead of: C.,T, E., F.,...

[alexhb1]

Issue here: #2117