Make printing a receipt after payment transactions optional.

Thanks. Works as expected.

FYI, the result of this patch works as expected (thanks!) but I had the 2 rejections below because I'd already applied add_order_refreshing-2555491-2.patch.

commerce_pos.module:

@@ -380,4 +382,4 @@ function commerce_pos_commerce_pos_panes() {
     'weight' => 10,
   );
   return $panes;
-}
\ No newline at end of file
+}

commerce_pos.pages.inc:

@@ -142,4 +148,4 @@ function commerce_pos_configuration_form_submit($form, $form_state) {
       cache_clear_all("plugins:commerce_pos:$plugin_type", $info['cache table']);
     }
   }
-}
\ No newline at end of file
+}

Patch addresses issue; provides the ability to toggle automatic report printing. Code looks good.