Improvement/pdp import data and button to export subjects table to excel

Added migration to support extra field in worker to write comments. Added button to export subjects table to excel Closes #291 (closed) #290 (closed)

smash/web/templates/subjects/index.html

@@ -13,6 +13,13 @@
             font-weight: bolder;
             border-bottom: black 1px solid;
         }
+
+        .dataTables_length{
+            display: inline-block;
+        }
+        .dt-buttons{
+            margin-left: 10px;
+        }
         .visit_row{
             font-size: 10pt;
             max-width: 22ch;
@@ -65,9 +72,16 @@
 {% block scripts %}
     {{ block.super }}
 
-    <script src="{% static 'AdminLTE/plugins/datatables/jquery.dataTables.min.js' %}"></script>
-    <script src="{% static 'AdminLTE/plugins/datatables/dataTables.bootstrap.min.js' %}"></script>
-    <script src="{% static 'js/subject.js' %}"></script>
+    <script type="text/javascript" src="{% static 'AdminLTE/plugins/datatables/jquery.dataTables.min.js' %}"></script>
+    <script type="text/javascript" src="{% static 'AdminLTE/plugins/datatables/dataTables.bootstrap.min.js' %}"></script>
+    <script type="text/javascript" src="{% static 'AdminLTE/plugins/datatables/extensions/Buttons/js/dataTables.buttons.min.js' %}"></script>
+    <script type="text/javascript" src="{% static 'AdminLTE/plugins/datatables/extensions/Buttons/js/buttons.bootstrap.min.js' %}"></script>
+    <script type="text/javascript" src="{% static 'AdminLTE/plugins/datatables/extensions/Buttons/js/buttons.colVis.min.js' %}"></script>
+    <script type="text/javascript" src="{% static 'AdminLTE/plugins/datatables/extensions/Buttons/js/buttons.html5.min.js' %}"></script>
+    <script type="text/javascript" src="{% static 'AdminLTE/plugins/datatables/extensions/JSZip/jszip.min.js' %}"></script>
+    <script type="text/javascript" src="{% static 'AdminLTE/plugins/datatables/extensions/pdfmake/pdfmake.min.js' %}"></script>
+    <script type="text/javascript" src="{% static 'AdminLTE/plugins/datatables/extensions/pdfmake/vfs_fonts.js' %}"></script>
+    <script type="text/javascript" src="{% static 'js/subject.js' %}"></script>
 
     <script>
         function getSubjectEditUrl(id) {
@@ -89,8 +103,8 @@
                 tableElement: document.getElementById("table"),
                 columns: getColumns(data.columns, getSubjectEditUrl),
                 checkboxesElement: document.getElementById("visible-column-checkboxes"),
-                dom_settings: 'lrtip' // show table without search box
-            });
+                dom_settings: 'lBrtip' // show table without search box
+            })
         });
 
         $('body').tooltip({