* now you save a correct size screenshot of the sorting
* now there's a loading spinner when elaborating screenshots and saving the interview
* now when you delete the interview you delete all the files attached
* bugfixed newstudy layout
* now the distance to the circle center is calculated from the center of the token
* in the interview the questions are now showed one by one with a corresponding button
* TESTED: all the interview values are always available, you can go on and go back to change your current answer or sorting order
* now the file size of the interview screenshot is calculated