refactor(apis_entities): cleanup relation listings in detailview

The relations were a card in a card in a card. Thats too much borders
and clutters the view. Lets at least drop the most inner card.

apis_core/apis_entities/templates/apis_entities/detail_views/detail_generic.html

@@ -217,14 +217,8 @@ <h3>Relations</h3>
  {% for obj in right_card %}
 
  {% if obj.1.data|length > 0 %}
- <div class="card card-default">
- <div class="card-heading">
- <h4 class="card-title">{{ obj.0 }}</h4>
- </div>
- <div class="card-body">
- <div id="tab_{{ obj.2 }}" class="card-body">{% render_table obj.1 %}</div>
- </div>
- </div>
+ <h4>{{ obj.0 }}</h4>
+ <div id="tab_{{ obj.2 }}">{% render_table obj.1 %}</div>
  {% endif %}
 
  {% endfor %}