NEW:

- kb.nl supports ISSN searches
- performance increase when swiping between books
- Settings dialogs now follow user-settings for dialog/bottomsheet

FIXES:
- fix the group book-count. This fixes in particular "Grouping on dates"
  and "Grouping on Series, then on Author" but is generic and valid
  for all similar situations.
- editing the bookshelves WHILE editing a book will now correctly
  rename/delete shelves on the book
- popup menu/submenu on screen positioning fixed
- tablets (10") display dialogs properly sized instead of too large / too small.