When there is only one option pre-select it

I guess it only makes sense if the field is required. What do you think, @Grimreaper?

Hi,

Not necessarily.

My use case is a 3 levels vocabulary (course > level > year).

I use term_reference_tree to force to reference leaf only (year).

Currently my leafs are alone (next year no more alone) and also sometimes my second level terms has only one option too when there is only one "level" available.

I don't want to force the exposed filter in my view to be required.