Edit

The new resizable version of the area filter looks much better already.

But 2 issues need to be solved.

1) If > 1 vocabularies are shown the second and maybe also further vocabularies do not have a label anymore it is somehow hidden under the slider.

2) If a vocabulary has only few terms (e.g. because it is used rarely or accidentely) the covering area should not be larger than the required area. Otherwise there is a lot of whitespace as default. Of course this can be changed by the user by using the slider but still ...

Issue 1) is definitely more critical than 2)