Major improvements:
1) In the slider view, boxes have been added to visualize parameters belonging to the same group.
2) The code is compiling with wxWidget 2.6.2. It can still be compiled with the former wxWidgets 2.4.2.

Minor improvements:
1) Slider value on the screen are now updated when assigned to the switch.

Minor bugs solved:
1) Wrong size was used for the slider when the parameter was using a table.
2) Some potential file leaks have been removed.
3) Replaced some delete by ->Destroy() as adviced for wxWindows based-class.