ENYO-1741: A Sign-In error Pop-up appears if the user open the "Project ...

...Properties" Pop-up and he is not authentified in his Phonegap account.

The Sign-In error Pop-up (Ares.SignInErrorPopup) is inherited from the" Ares.Error" Pop-up, and have in addition a "Sign In" button that show the "Account" Pop-up.