Add NOTIFY support to purchase reports

config/Reports/fypurchase.xml

 				buffer.close();
 			}
 			refresh();
+            var notifier = Application.subscribe("purchasechange");
+            notifier.notify.connect(function() {
+                refresh();
+            });
 			/* Update report as needed. */
 			dateSelect.rangeUpdated.connect(function() {
 				refresh();

config/Reports/invoices.xml

                 buffer.close();
             }
             refresh();
+            var notifier = Application.subscribe("invoiceschange");
+            notifier.notify.connect(function() {
+                refresh();
+            });
         ]]>
-    </program>
+    </program>

config/Windows/navigation.xml

             query.exec("CREATE TRIGGER notify_purchase_changed AFTER INSERT OR UPDATE OR DELETE ON purchase FOR EACH STATEMENT EXECUTE PROCEDURE notify_purchase_changed()");
             query.exec("CREATE OR REPLACE FUNCTION notify_sale_changed() RETURNS trigger AS $$ BEGIN NOTIFY SaleChange; RETURN NULL; END; $$ LANGUAGE plpgsql");
             query.exec("CREATE TRIGGER notify_sale_changed AFTER INSERT OR UPDATE OR DELETE ON sale FOR EACH STATEMENT EXECUTE PROCEDURE notify_sale_changed()");
+            query.exec("CREATE OR REPLACE FUNCTION notify_invoices_changed() RETURNS trigger AS $$ BEGIN NOTIFY InvoicesChange; RETURN NULL; END; $$ LANGUAGE plpgsql");
+            query.exec("CREATE TRIGGER nofify_invoices_changed AFTER INSERT OR UPDATE OR DELETE ON invoices FOR EACH STATEMENT EXECUTE PROCEDURE notify_invoices_changed()");
+            query.exec("CREATE TRIGGER notify_invoices_changed AFTER INSERT OR UPDATE OR DELETE ON invoice_items FOR EACH STATEMENT EXECUTE PROCEDURE notify_invoices_changed()");
             
             query.exec("UPDATE TypicaFeatures SET version = 8 WHERE feature = 'base-features'");
             query = query.invalidate();