Enable 'tree view' for build order table (#3070)

* Enable 'tree view' for build order table

* Ensure we pass locale code to the build table

* Adjust button class based on current context

* Fix display of 'child builds' table on build page

* Force a rebuild of the entire table when the filters are refreshed

* Refactor PurchaseOrder table also

* Refactor existing SalesOrder table also

* JS linting

InvenTree/part/templates/part/detail.html

@@ -514,7 +514,7 @@
         });
 
         loadBuildTable($("#build-table"), {
-            url: "{% url 'api-build-list' %}",
+            locale: '{{ request.LANGUAGE_CODE }}',
             params: {
                 part: {{ part.id }},
             }