[Feature] Lighting - indicator for azimuth/altitude

One thing I noticed after rendering a ton of pictures where i wanted to change the lighting is, that it is quite tedious to setup the lighting correctly.

One of the main problems I had is that I'm never 100% sure where the sun actually is in relation to my scene until i start rendering.

I was wondering if it would be possible to add a little widget to the lighting-screen. Basically a tiny render of a scene which uses the same camera angle as the real scene (so if you move your camera around, it would change accordingly). The scene itself would just be a sphere/box/... on a simple plane. Roughly something like this: https://unity3d.com/sites/default/files/realtime_0.png (ignore the light-indicator stuff - i'm only using this image because it shows the egg-thingy on a plane casting a shadow)

This way you could immediatly see how changing the azimuth or altitude of the sun would change the lighting of your scene. And rendering the preview shouldn't take that much time if its only 100*100 pixel or something like that.