* develop-ascraeus:
[ticket/12759] Fix type_bool and type_dropdown's UCP fields
[ticket/12759] Remove lang_helper from profilefields_manager
[ticket/12759] Cache all lang_options in lang_helper instead
[ticket/12759] Extra line in profilefields_manager
[ticket/12759] Cache lang_options for pm_viewmessage
[ticket/12759] Cache lang_options on memberlist
[ticket/12759] Add phpDoc comments to explain get_option_lang
[ticket/12759] Little code cleanup
[ticket/12759] Make sure $field_id has unique elements
[ticket/12759] Cache the lang options earlier
[ticket/12759] Cache lang options for all fields while displaying
[ticket/12759] Allow multiple fields to be loaded via get_option_lang