ENYO-2038: remove automatic setting to edited for a file when switching to designer

In general, the file is in modified state  when the first passage in designer is done. The designer apply a new code indentation to the file.

We have an asterix near the Deimos label in Deseigner that shows if the file is in edited state.

Tested on Windows 7, Chrome

Enyo-DCO-1.1-Signed-off-by: Olga Popova <olga.popova@hp.com>