Prusa Mini Dual Drive Extruder Rev6 - Filament switch fix

Fix to use filament sensor with the -excellent- Dual Drive Extruder without firmware hack.

You need both files, since the new top allows some room for the inversed filament lever-switch.

You still need to invert black and red wire. As stated in the original.

The v2 of the switch has a smaller gap for the magnet. It should now stay in there.