Polylang: Add an option to add a non-public Pod to Polylang translation objects

[JoryHogeveen]

When a CPT or Tax Pod is set to non-public it isn't visible for Polylang translation settings.

Todo:

• Add an option to allow the user to hook them into the Polylang translation options. Ther is a simple filter hook available in Polylang to add them to the list.

@sc0ttkclark
Would you prefer this in Pods core or in the i18n component? I'm not sure...

If in core: I'd say put it in the PodsI18n class.
(And while we're at it, also put get_current_language() from PodsAPI in PodsI18n)

[sc0ttkclark]

Add to core / PodsI18n

[sc0ttkclark]

Did we end up doing anything here?

[JoryHogeveen]

Nothing done yet, I'll add it to my todo for this week.

[JoryHogeveen]

Where should we put the option in the Pod settings tabs? Advanced options or a new tab? And in case of a new tab: "i18n" or "Polylang"?