Add order priority column to DepartmentsTable for future draggable implementation

src/components/displays/superuser/tables/departmentsTable.vue

@@ -33,6 +33,7 @@ const redirect = (path) => {
     <table class="table is-fullwidth">
       <thead>
       <tr>
+        <th><-- Order priority --></th>
         <th>{{ SessionUser.objects.departments.columns.id.label }}</th>
         <th>{{ SessionUser.objects.departments.columns.name.label }}</th>
         <th>{{ SessionUser.objects.departments.columns.description.label }}</th>
@@ -44,6 +45,9 @@ const redirect = (path) => {
       </thead>
       <tbody>
       <tr v-for="department in objects" :key="department.id">
+        <td>
+          <!-- Order priority draggable -->
+        </td>
         <td>{{ department.id }}</td>
         <EditableTableColumn
             :object="department"