[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/snippets/username.html

@@ -1,2 +1,15 @@
+{% spaceless %}
 {% load bookwyrm_tags %}
-<a href="{{ user.local_path }}" class="user">{% if user.name %}{{ user.name }}{% else %}{{ user | username }}{% endif %}</a>{% if possessive %}'s{% endif %}{% if show_full and user.name or show_full and user.localname %} ({{ user.username }}){% endif %}
+
+
+<{% if anchor %}a href="{{ user.local_path }}"{% else %}span{% endif %} class="user"
+>
+    {{ user.name|default:user|username }}
+</a>
+
+{% if possessive %}'s{% endif %}
+
+{% if show_full and user.name or show_full and user.localname %}
+ ({{ user.username }})
+{% endif %}
+{% endspaceless %}