Python styling fixes

InvenTree/part/templates/part/used_in.html

@@ -35,6 +35,7 @@
             {
                 field: 'part_detail',
                 title: 'Part',
+                sortable: true,
                 formatter: function(value, row, index, field) {
                     var html = imageHoverIcon(row.part_detail.image_url) + renderLink(value.full_name, value.url + 'bom/');
 
@@ -48,8 +49,10 @@
             {
                 field: 'part_detail.description',
                 title: 'Description',
+                sortable: true,
             },
             {
+                sortable: true,
                 field: 'quantity',
                 title: 'Uses',
             }

InvenTree/part/templates/part/variants.html

@@ -24,9 +24,9 @@
 <table class='table table-striped table-condensed' id='variant-table' data-toolbar='#button-toolbar'>
     <thead>
         <tr>
-            <th>Variant</th>
-            <th>Description</th>
-            <th>Stock</th>
+            <th data-sortable='true'>Variant</th>
+            <th data-sortable='true'>Description</th>
+            <th data-sortable='true'>Stock</th>
         </tr>
     </thead>
     <tbody>