Oscilloscope improvements
- Add X input to Oscilloscope. As soon as it is connected, it will automatically switch to X/Y mode.
- Optionally, add a Z input to switch the beam on or off.
- Without any signal, only a green dot in the display center will be shown.
- X and Y controls are X/Y amplitude controls
- Tapping and moving inside the Oscilloscope screen allows for moving the graph
- Double-tapping resets the graph to the center position