Add fields `CATEGORIES`, `URL` and `X-JABBER`

[fhmbrg]

In many of my VCARDS I use the above fields. Unfortunately Simple-Contacts isn't able to show them.

The Simple-Contacts version I use is: 6.15.1 Pro.

Furthermore it would be nice to be able to use all the other fields, just in case ;-). For displaying a contact only the populated ones are needed.

[tibbi]

you can already enable some extra fields in the app Settings -> Manage visible contact fields

[fhmbrg]

I know but those doesn't cover the ones I'm looking for.

[leviwheatcroft]

I think CATEGORIES is particularly important.

From the vCard RFC:

Purpose: To specify application category information about the vCard, also known as "tags".

Value type: One or more text values separated by a COMMA character (U+002C).

So basically, it's the field many implementations are using to tag or group vcards.

Google (and therefore android phones) have a different non-spec way to manage groups. Simple Contacts is naturally going to attract a lot of users trying to de-google themselves, for whom tagging / grouping contacts with CATEGORIES is going to be critical.