#26 Annual conservation report

* Adds download as excel sheet
* improves db access performance

analysis/templates/analysis/reports/detail.html

@@ -9,13 +9,13 @@
         </div>
         <div class="col-sm-12 col-md-12 col-lg-6">
             <div class="d-flex justify-content-end">
-                <div class=" menu-elem dropdown">
+                <div class="dropdown">
                     <div class="btn btn" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
                         <button class="btn btn-default" title="{% trans 'Download' %}">
                             {% fa5_icon 'download' %}
                         </button>
                     </div>
-                    <div class="dropdown-menu">
+                    <div class="dropdown-menu dropdown-menu-right">
                         <a href="{{request.url}}?format=excel&{{request.GET.urlencode}}">
                             <button class="dropdown-item" title="Excel">
                                 {% fa5_icon 'file-excel' %} Excel