The previous naming scheme for the "selected to active" baking option lead to confusion and they were not describing what they actually did.
To remedy this, I've added a new settings that does what the older setting implied it did.
I do think I will have to provide a better description for the older settings and update the documentation.
At least for me, I feel that it is very hard to grasp what they are actually doing right now.
Dalai and Brecht, what do you think about this explanation for the `cage_extrusion` setting?
```
Old: Distance to use for the inward ray cast when using selected to active
New: The distance the ray starting position will be extruded along the face normal
```
Now this might not be a better description either, but at least we have a starting point :)