Merge pull request #1 from mumoc/add_style_subscription_interval

Add style subscription interval
Fix order steps
[#55520884] Subscription admin layout

* Shows the order number instead of the product name.
* Shows the user email instead of the user id.
* Shows the total price instead of the unitary price.
Merge pull request #2 from mumoc/change_layout_admin_subscriptions

[#55520884] Subscription admin layout
[#55162364] Add spanish translations
Merge pull request #3 from mumoc/translate_to_spanish

[#55162364] Add spanish translations
Merge branch 'master' of github.com:mumoc/spree-subscribe into add_style_subscription_interval