Would be cool.
But the background is a skybox calculated during hyper-jumps.
Not sure if FD could manage at-will highlighting a star that is on essentially a large spherical jpeg.
On the galaxy map, sure. But the view from the cockpit, probably not technically feasible or not worth the effort.
But cool for sure, I'd love to be able to click on any start in the sky from the HUD and plot a route there!