ENYO-2435: "package.js" files updating after a DnD action in the file manager

Checked on Windows 7 Enterprise, guess it will be ok on Linux and MacOS.
Ready to be merged.

* ENYO-2435: Code style application
* ENYO-2435: "package.js" files updated after a DnD action in the file manager

Enyo-DCO-1.1-Signed-off-by: Vincent HERILIER <vincent.herilier>@hp.com