Adds "stock" column sorting for stock table

InvenTree/stock/api.py

@@ -876,6 +876,7 @@ class StockList(generics.ListCreateAPIView):
 
     ordering_field_aliases = {
         'SKU': 'supplier_part__SKU',
+        'stock': ['quantity', 'serial'],
     }
 
     ordering_fields = [
@@ -887,6 +888,7 @@ class StockList(generics.ListCreateAPIView):
         'stocktake_date',
         'expiry_date',
         'quantity',
+        'stock',
         'status',
         'SKU',
     ]

InvenTree/templates/js/translated/stock.js

@@ -1128,7 +1128,9 @@ function loadStockTable(table, options) {
 
     col = {
         field: 'quantity',
+        sortName: 'stock',
         title: '{% trans "Stock" %}',
+        sortable: true,
         formatter: function(value, row) {
 
             var val = parseFloat(value);