When I select "Power raft ABS" as bottom layer base, I'll most likely not want to have "fan PLA" as preset.
So it would make more sense to at least move them close together.
Ideally, I'd suggest linking them, so that when one is set to PLA or ABS, the other is automatically changed as well. (Maybe just change the fan based on bottom layer?)
A separate symbol to the right could be used to unlink them, for cases where the two are set independently.