ENYO-3081: Launch Enyo API Viewer in a separate tab browser from Ares menu

Related JIRA: https://enyojs.atlassian.net/browse/ENYO-3081

Add an Ares menu item to launch a separate tab browser to show Enyo API viewer within.

Enyo-DCO-1.1-Signed-off-by: Vincent HERILIER vincent.herilier@hp.com