rcm-fr instead of rcm-it

In AmazonWidgetsShortcodeConfiguration.class.php, in the it section, the [url][widget-product] entry is wrong, it has https://rcm-fr instead of https://rcm-it

Another thing, after I check the disable widgets/shortcodes checkboxes, and the page reloads, the checkboxes are all unchecked! It didn’t save the choice also.

Great plugin by the way, keep up the good work!