User current locale when converting to uppercase string.
Merge pull request #1826 from wordpress-mobile/issues/1570-localized-upper-case

User current locale when converting to uppercase string.
Merge branch 'develop' of github.com:wordpress-mobile/WordPress-iOS into feature/pod-editor

* 'develop' of github.com:wordpress-mobile/WordPress-iOS:
  User current locale when converting to uppercase string.