Edited Feature: Expandable Property not expanded by default [20054]

Based on discussion https://wpftoolkit.codeplex.com/discussions/452722, user wants to have an expand property expanded by default.

Maybe having a new ExpandableObjectAttribute which take a true/false parameter would do the job.
Comments: ** Comment from web user: BoucherS **

The ExpandableObjectAttribute with a True/False parameter will be included in the v2.3 of the toolkit.