This Prefs-internal class is used to parse * Set and * Local statements
from arbitrary text, and extract settings from meta objects. It is used
by TopicPrefs to parse preference settings from topics.
This class does no validation or duplicate-checking on the settings; it
simply returns the recognized settings in the order it sees them in.
Traverses through all PREFERENCE attributes of the meta object, creating one
setting named with $settingPrefPrefix . 'title' for each. It also
creates an entry named with the field 'name', which is a cleaned-up,
space-removed version of the title.
Settings are added to the $prefs passed.
