ENYO-2316: Inspector property settings are not loaded

Ready for review.

Summary:
. lib/extra (ENYO-2315) integrated in ares-project
. Model.js and Palette.js modified according to changes coming from ENYO-2315

Enyo-DCO-1.1-Signed-off-by: Marie-Antoinette de Bonis-Hamelin (Marian)
marie-antoinette.de-bonis-hamelin@hp.com