Add i18n to docs example
Improve more fields in dashboard templates
Add find_by_code method to shipping repository

This is needed to ensure the shipping method is looked up correctly when
using PayPal Express as a payment method only.
Look up shipping method name from session (when appropriate)

It appears to be impossible to pass the name of the shipping method to
PayPal Express when shipping amount is specified directly.  Hence, we
need to rely on the shipping method stored in the session to retrieve
the name.