ENYO-3071: set project as the default tab when projectprojecties is shown

* Problem
When Project Properties popup is shown, it has shown the recent selected tab like phonegap or webos.
(expected result: Project Properties popup should show the project tab as the default.)

* Change
Before showing Project Properties popup, it set the first child tab as the default tab.

Enyo-DCO-1.1-Signed-off-by: Junil Kim <logyourself@gmail.com>