This process can unfortunately not be automated. But you can make use of three features to accelerate the process:
- Enable "Orbit Mode" (top right corner of "Edit Bricks"-window) to center the camera on the selected brick
- Enable "Smart Cull" to only display the bricks around the selected brick
- Press E (or click "Next Brick") to select the next brick which has no dependency information set
This way you don't have to move the camera much and don't need to leave the "Toggle Dependency" mode. Simple sets (especially older, non-Technic sets) can be setup within a few minutes this way. I hope this helps. If you have an idea on how to make it even easier and quicker, let me know!