ENYO-4003: fix open document after designer close


* ENYO-4003: reload designer only when project is switched 
* ENYO-4003: Added missing transition from closed to reloading

Related JIRA: https://enyojs.atlassian.net/browse/ENYO-4003

Enyo-DCO-1.1-Signed-off-by: Dominique Dumont <dominique.dumont@hp.com>