ENYO-2403: The UI "Phonegap Build" Charge the values of Phonegap build configuration parameters each time it shows up.

ENYO-2724: Now the UI Phonegap build show the values of Phonegap configuration attributs when Ares is refreshed in the browser. 

Test scenario : 
- Fill all the rows of the panel "Phonegap Build" 
- Click on the "Ok" button of the Pop-up "Project->Edit"
- In the folder of the actual project, open the file "project.json" (the content of the node "phonegap" of the JSON file    
  should contains the previous value entred in the UI)
- Press F5 or CTL-F5 to refresh the Ares IDE
- The panel  "Phonegap Build"  should show the values contained in the "project.json" file

Tested on "Chrome", "Chrome Canary", "FireFox", "IE" & "Safari"

Ready for review 
Enyo-DCO-1.1-Signed-off-by: Rafik Adiche mahmoud-rafik.adiche@hp.com