ENYO-2774: raise an alert if enyo is too old in designer frame

* ENYO-2774: added a minEnyoVersion attribute. Set to 2.3.0-pre.9 
* ENYO-2774: Merge remote-tracking branch 'origin/master' into ENYO-2774
* ENYO-2774: improved error message
* ENYO-2774: check that enyo pilot-5 or later is loaded (was pilot-6)
* ENYO-2774: send the error through the designer instead of using old fashioned alert
* ENYO-2774: raise an alert if enyo is too old...

Enyo-DCO-1.1-Signed-off-by: Dominique Dumont <dominique.dumont@hp.com>