Allow hiding the grid and cursors overlay

[unfa]

Hi!

Sometimes I'd like to be able to hide the grid and other control parameters displayed on the scope screen to have only the waveforms, with nothing else.

Could there be a switch for hiding the extra overlays?

Here's a little mockup:

That'd be for capturing and re-using sisco display in a video foe example, as eye candy, so the grid, cursors and other stuff would make it harder to composite the image.