Alert developers if the config split folder is not correctly configured

Thanks for opening this issue and providing a patch.
This is a good compromise between making it more obvious what is going on and keeping it simple.

Just out of curiosity, I thought the folder was required when selecting the folder in the form, but how difficult would it be to add some config validation. I know core is on the way to make config validation much more of a thing so maybe that would be a good thing to add. Of course we can do that in a follow up issue too.

I'll commit this next time I work on config split

Automatically closed - issue fixed for 2 weeks with no activity.