Add "external" field to StockLocation (#4377)

* Add "external" field to StockLocation

- New model for field
- Database migrations
- Serializer / API updates
- Front end tables / filters

* Update API version

InvenTree/templates/js/translated/stock.js

@@ -117,6 +117,7 @@ function stockLocationFields(options={}) {
         description: {},
         owner: {},
         structural: {},
+        external: {},
         icon: {
             help_text: `{% trans "Icon (optional) - Explore all available icons on" %} <a href="https://fontawesome.com/v5/search?s=solid" target="_blank" rel="noopener noreferrer">Font Awesome</a>.`,
             placeholder: 'fas fa-box',
@@ -2491,6 +2492,24 @@ function loadStockLocationTable(table, options) {
                 title: '{% trans "Stock Items" %}',
                 switchable: true,
                 sortable: true,
+            },
+            {
+                field: 'structural',
+                title: '{% trans "Structural" %}',
+                switchable: true,
+                sortable: false,
+                formatter: function(value) {
+                    return yesNoLabel(value);
+                }
+            },
+            {
+                field: 'external',
+                title: '{% trans "External" %}',
+                switchable: true,
+                sortable: false,
+                formatter: function(value) {
+                    return yesNoLabel(value);
+                }
             }
         ]
     });