leaflet: Add the folded property
This is a boolean equivalent of the fold property, it is a needed convenience as is can be used in GtkBuilder declarations while the fold property is more convenient to use from C as it enables stronger typing.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
This is a boolean equivalent of the fold property, it is a needed convenience as is can be used in GtkBuilder declarations while the fold property is more convenient to use from C as it enables stronger typing.