Show tags on non-image gallery preview card

Tags and images aren't coupled, so they shouldn't be coupled in
the UI, either. This also makes the titles and source domains show
up consistently for image and non-image entry cards.

src/Wallabag/CoreBundle/Resources/views/themes/material/Entry/_card_no_preview.html.twig

@@ -1,5 +1,12 @@
 <div class="card">
     <div class="card-body">
+        <div class="card-image waves-effect waves-block waves-light">
+            <ul class="card-entry-labels">
+            {% for tag in entry.tags | slice(0, 3) %}
+                <li><a href="{{ path('tag_entries', {'slug': tag.slug}) }}">{{ tag.label }}</a></li>
+            {% endfor %}
+            </ul>
+        </div>
         {% include "@WallabagCore/themes/material/Entry/Card/_content.html.twig" with {'entry': entry} only %}
     </div>