Show real data from a craft in OSD preview tab

[wKich]

Is your feature request related to a problem? Please describe

For better alignment you might want to see how looks your real telemetry data from a craft.

Describe the solution you'd like

The configurator is already able to show some telemetry in UI, like batteries data / stick inputs / gyro / accelerometer / motors / etc, so we just need to read these data and render output string for the preview.

Describe alternatives you've considered

As a fallback I suggest to add a way that allows enter any value instead of random generated or even hardcoded ones.

The other way to improve it, is add a way to move elements directly from OSD menu, but I think it's required to make some changes in the firmware.

Other information

Ideally it would be awesome if the configurator is able to show video input instead of static image. So you can connect a video receiver to your PC and select video input in the configurator. The downside of it, you probably can't move elements directly without saving changes. As a workaround we could draw overlay with rectangles in positions where elements should be according the settings.

If you agree with any of my ideas, I can try to implement it.