Period in dashboard is not localized #1579

The period format in the dashboard is not localized, but always in Y-m-d format.

Perhaps we can use some new translations like "CoreHome_PeriodMonth_Format" to get the format localized.

See attached files for examples.

Attachment:
de.php.diff

Attachment:
Day.php.diff

Attachment:
Week.php.diff

Attachment:
Month.php.diff

Localization is closely related to i18n, but is a separate issue. It should be handled more like currency and number format (via config rather than translation).

dupes #1187