New icon for missing geometry

* introduces "..." as new icon for missing geometry entries
    * moves former explanatory message into title attribute for mouse hover activation

templates/table/gmrkng_col.html

@@ -9,5 +9,7 @@
         </span>
     {% endfor %}
 {% else %}
-        <span class="badge pill-badge rlp-r-inv">{% translate 'No geometry added, yet.' %}</span>
+        <span class="text-info" title="{% translate 'No geometry added, yet.' %}">
+            {% fa5_icon 'ellipsis-h' %}
+        </span>
 {% endif %}