Origin/m/international/locations/countries edit rebased

[margud]

Questions	Answers
Branch?	develop
Description?	Edit action of Countries form
Type?	refacto
Category?	BO
BC breaks?	no
Deprecations?	no
Fixed ticket?	Fixes #10604
How to test?	You can now edit country with new symfony controller.

[prestonBot]

This pull request seems to contain new translation strings. I have summarized them below to ease up review:

• Admin.International.Feature
  • [ ] This country does not exist
  • [ ] Failed to update country
  • [ ] Failed to update country. An unexpected error occurred.
  • [ ] Country contains invalid field values

(Note: this is an automated message, but answering it will reach a real human)

[zuk3975]

should rebase instead of merge to avoid having the develop changes as your own and so the PR validator won't block your PR for merge commits