ENYO-2998: Restrict project template list to bootplate-2.3.0-pre.5 to avoid style loss issue

Enyo-DCO-1.1-Signed-off-by: Yves Del Medico <yves.del-medico@hp.com>
Merge pull request #571 from enyojs/ENYO-2998-2

ENYO-2998: Restrict project template list to bootplate-2.3.0-pre.5 to avoid style loss issue