Thanks, that’s great. I just tried it and works as you described.
Do you intend to add a tiny circle at the tip of the clipping plane (like the circles for object extrusion on the Gumball handle) in a future update that will make it possible to invert its direction with a single mouse click, even without the need to select the clipping plane?
Currently, it requires at least 3-5 mouse clicks for selecting it, opening the Properties window, going to the Clipping plane tab and clicking on “Flip direction”, then closing the Properties window again.
With the "“Flip direction” command, it requires 3 mouse clicks (RMB on the “Analyze direction” button, then picking the clipping plane with the LMB, then clicking again with the RMB or pressing the Enter key to confirm).