Use workaround for displayname not localename.

[dobey]

Only use the workaround of using pt_pt to solve the display name
issue, and not set the actual locale to pt_PT (which doesn't exist
on disk in the langpack, as it's only pt or pt_BR).

[mariogrip]

LGTM 👍

[dobey]

I think @UniversalSuperBox was having some issues with it still, in that plain pt was not showing up in the list for some reason, with this change. So please don't merge yet. :)

[UniversalSuperBox]

Just to put it on the record, this will (eventually) fix ubports/ubuntu-touch#510

[Flohack74]

Is this ready to merge?

[dobey]

@Flohack74 I guess not. It seems plain Portuguese gets removed from the list with this change for some reason. :-/

[UniversalSuperBox]

The reason we haven't been able to add the pt locale (which we expect to be pt_PT) is because Qt has a set of likely locales for each language (for example, you get en_US when you select en). For pt it's pt_BR rather than pt_PT, so we need to keep the workaround in place.