Database performance

* optimizes the db fetching for all index views and detail views
* introduces usage of managers.py in all necessary apps for wrapping basic fetch settings
* moves comment.html to comment_card.html under /konova/templates/konova/
* adds/updates translations
* fixes document typos
* drops comment rendering in public reports
* opens public reports in new tabs if button is clicked from the detail view

ema/templates/ema/detail/includes/controls.html

@@ -6,7 +6,7 @@
             LANIS
         </button>
     </a>
-    <a href="{% url 'ema:report' obj.id %}" class="mr-2">
+    <a href="{% url 'ema:report' obj.id %}" target="_blank"  class="mr-2">
         <button class="btn btn-default" title="{% trans 'Public report' %}">
             {% fa5_icon 'file-alt' %}
         </button>