WP Property Setting Keys

The following setting keys were added by action_hooks.php in a very un-sexy way before. As action_hooks.php is removed in WPP 2.0.0, these properties need to be added to the settings schema with default values as before.

property_meta
location_matters
searchable_property_types
searchable_attributes
search_conversions
image_sizes
configuration.google_maps.infobox_attributes
hidden_attributes
property_stats
property_types
property_inheritance