Add action give store credits as percentage
Integrate to the checkout workflow the store credit as percentage
Add admin view for give_store_credit_as_percentage with translations
Refactoring for not apply twice the store credit to the same order
Update translations
Register give_store_credit_as_percentage as an action in the engine
FIX typo
FIX for nil users and for reason translation
FIX persisting updates of order total after applying the adjustments