Add GroupTokens to replace WelcomeTokens

[eileenmcnaughton]

Overview

In conjunction with #24235

Hmm - this would make {group.title} work - but I see replaceResubscribeTokens actually concatentates several group titles together - not quite sure how we could do this to support that too ....

  public static function &replaceResubscribeTokens(
    $str, &$domain, &$groups, $html,
    $contact_id, $hash
  ) {
    if (self::token_match('resubscribe', 'group', $str)) {
      if (!empty($groups)) {
        $value = implode(', ', $groups);
        self::token_replace('resubscribe', 'group', $value, $str);
      }
    }
    return $str;
  }

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[colemanw]

@eileenmcnaughton style warnings

[eileenmcnaughton]

It has passed now

[seamuslee001]

Jenkins re test this please

[eileenmcnaughton]

@seamuslee001 this has passed now

[seamuslee001]

Yeh this seems sensible

[eileenmcnaughton]

thanks @seamuslee001