Sync with fork / update

[lhotakj]

Hello @sakgiok , first of all, thanks for your plugin, I've been using it for more than a year! Meantime I made also a partial translation to Czech language, if you're interested in, I can create a PR.

However I've found some clone of this addon https://conexiaweb.es/producto/contrareembolso-con-recargo-para-prestashop/ without even a mention of your name, which find very disappointing.

Would you mind to review this version and update/fix some possible issues from it to your master?

And once again thanks for your work, I really appreaciate it! Kind regards, Jarda