Touchscreen sensitivity configuration

Now the user can choose between STANDARD, ENHANCED and EXTREME touchscreen sensitivity, upon entering the Calibration App.

This will help performing the calibration  on those clone H1 portapacks carrying a "less than optimal" sensitivty touchscreen.

After calibrating the touchscreen, the user will be presented -as before- with an option for saving the calibration data. Now, also, the sensitivity index will be saved too, so the touchscreen will be easier to use in every normal operation.