#GladeProperty can be set in a list as one command, for Undo purposes; we store the list of #GladeCommandSetPropData with their old and new #GValue.
The new #GValue to assign to property
property
The old #GValue of property
A #GladeProperty to set
#GladeProperty can be set in a list as one command, for Undo purposes; we store the list of #GladeCommandSetPropData with their old and new #GValue.