2.8 Viewport Backside Shading

Prior 2.80 there was a graphic querk which made the backfaces of objects in solid shading view slighly darker. Now in 2.80 that querk is fixed and we don't have a really good way of telling if faces are backwards. Currently there are following options to do that:

1. Viewport Overlays > Face Orientation > Get Sore Eyes > Never come back to the computer
2. Show X-Ray > Be confused
3. Viewport Shading > Backface Culling > Never see your great art again

All of these options are not really useful and there is nothing like the old shading querk in current Blender. I propose to replace the Face Orientation feature with a feature to add an overlay to backfaces. Instead of the Face Orientation checkbox there should be a checkbox for Backface Overlay with a Color Picker right next to it. That Color Picker should support the Alpha channel to make the overlay partially transparent. The default color should be something like a 20% Alpha blue-ish grey to complement the orange selection color.