Expand core.memberlist_view_profile event to include Zebra state

Expand 'core.memberlist_view_profile' event to include state of ZEBRA (friends - true/false and foes - true/false):

• @var bool foes_enabled Is the ucp foes module
• enabled?
• @since 3.1-A1
  */
  $vars = array('member', 'user_notes_enabled', 'warn_user_enabled', 'zebra_enabled', 'friends_enabled', 'foes_enabled');
  extract($phpbb_dispatcher->trigger_event('core.memberlist_view_profile', compact($vars)));

is changed to:

• @var bool foes_enabled Is the ucp foes module
• enabled?
• @since 3.1-A1
  */
  $vars = array('member', 'user_notes_enabled', 'warn_user_enabled', 'zebra_enabled', 'friends_enabled', 'foes_enabled', 'friend', 'foe');
  extract($phpbb_dispatcher->trigger_event('core.memberlist_view_profile', compact($vars)));