Simple DNS Changer (Beta)

• Add a new modal option for recover button : using Alt key modifier on recover button now trash all DNS in list at once instead.
• Use a logger (serilog) to log any Information, Warning, Error and Fatal message in logYYYYMMDD.txt file, with a roll-up each days. Those are created in a ./Logs folder.
• Handle any error or fatal log by force exiting the application after showing a message box telling that.
• Handle any unhandled exception as a fatal log (so force exiting the application)
• Clean up the code.