cover: tweak styles:

- `optimizeQuality` > `smooth` (CSS language evolution)
- Use `auto` instead of a fixed width.
- Add exceptions for heights and apply them to some previously modified templates.
- Remove `is-large` exception.
- Widen the content column on list curation.

bookwyrm/templates/lists/list_items.html

@@ -11,10 +11,10 @@
 
             {% with list_books=list.listitem_set.all|slice:5 %}
                 {% if list_books %}
-                    <div class="card-image columns is-mobile is-gapless is-clipped has-height">
+                    <div class="card-image columns is-mobile is-gapless is-clipped">
                         {% for book in list_books %}
                             <a class="column is-narrow" href="{{ book.book.local_path }}">
-                                {% include 'snippets/book_cover.html' with book=book.book cover_class='is-small' aria='show' %}
+                                {% include 'snippets/book_cover.html' with book=book.book cover_class='has-height is-h-small' aria='show' %}
                             </a>
                         {% endfor %}
                     </div>