home-assistant module overrides extraComponents when autoExtraComponents is true

[FRidh]

Issue description

I think this should be clearly mentioned in the manual.

19:30 <etu> Hmm, I have an issue regarding extraComponents in home-assistant. Can someone explain why the second block works but the first doesn't: https://ptpb.pw/31Lu/nix 
19:31 <etu> With the first block I get messages in the log like "python module missing" 
19:31 <etu> But reading the code it should result in the same thing 
19:37 <FRidh> etu: heh the module overrides extraComponents, you need to set autoExtraComponents 
19:38 <FRidh> I suggest opening an issue because this is just mean :) At the very least it would have to be added to the module description 
19:39 <etu> FRidh: Huh? autoExtraComponents? I don't find any option like this 
19:39 <etu> FRidh: ah, in the module 
19:39 <FRidh> etu it's a module option 
19:39 <etu> thanks 
19:41 <etu> FRidh: Well, that's an annoying module behaviour I'd say :D 

cc @dotlambda @peterhoeg

[dotlambda]

@etu Sorry for that. That's definitely not intended. In #43845, I changed it so that extraComponents is only overridden if config != null.