Dev 1.0

latest and finalize details of my project
I'm not sure if it is intentional but studying the flow of the activities in this application, using ```finish()``` in this part of the code is not necessary. By doing this, we simplify the flow.

Old:
Main Activity *close* --- start --> Setting *close* --- start --> Main Activity

New:
Main Activity --- start --> Setting *close* --- return --> Main Activity