Locales support for dates. Add setting for preferred date/time format.

[John-Paul-R]

haykam speaks and things happen

[John-Paul-R]

Locales support for dates is done.
Preferred date/time setting not yet started.

[John-Paul-R]

Locales support for dates is done.

I think this broke for the "List Updated" thing at some point and I reverted to YYYY-MM-DD as a quick fix. Might want to look into this again. (individual mod entries should still use the correct locale dates.)