[profile] Various HTML fixes:

- Wrap block level elements within block level elements, not inline.
- Avoid empty blocks.
- Change `<hr>` in lists into allowed type of children.
- Fix duplicated ID (some change that was not propagated across the template?).
- Make the anchor optional in the navbar (interactive elements (`a`, `input`, `button`…) should not appear into other interactive elements).
- Remove redundant `role` on main navigation.
- Make the modal a modal with `role="dialog".
- Use `button` instead of form-less `label`.

bookwyrm/templates/components/dropdown.html

@@ -5,7 +5,7 @@
         {% block dropdown-trigger %}{% endblock %}
     </button>
     <div class="dropdown-menu">
-        <ul class="dropdown-content" role="menu" id="menu-options-{{ book.id }}">
+        <ul class="dropdown-content" role="menu" id="menu-options-{{ uuid }}">
             {% block dropdown-list %}{% endblock %}
         </ul>
     </div>