ENYO-1963: fix Uncaught TypeError: Cannot set property 'key_pw'

- Cannot duplicate, so did a tactical bug fix.
* ENYO-1963: Cleanup of a few traces (origin/ENYO-1963, ENYO-1963)
* ENYO-1963: Fix uncaught error when saved signing key NONE

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>
Enyo-DCO-1.1-Signed-off-by: Yves Del Medico <yves.del-medico@hp.com>