[IMP] point_of_sale: allow to override auto printing

As show is needed to call super it is impossible to override the
function without running into the immediate print. It is possible though
that you might need some delay that local CPU has rendered everything on
the PoS Ticket before printing...based on this you are able to override
the handle_auto_print and add a delay there.

Closes #16174

addons/point_of_sale/static/src/js/screens.js

@@ -1404,7 +1404,9 @@ var ReceiptScreenWidget = ScreenWidget.extend({
 
         this.render_change();
         this.render_receipt();
-
+        this.handle_auto_print();
+    },
+    handle_auto_print: function() {
         if (this.should_auto_print()) {
             this.print();
             if (this.should_close_immediately()){
@@ -1413,7 +1415,6 @@ var ReceiptScreenWidget = ScreenWidget.extend({
         } else {
             this.lock_screen(false);
         }
-
     },
     should_auto_print: function() {
         return this.pos.config.iface_print_auto && !this.pos.get_order()._printed;