EDIT

fixing #4977: advanced search with distribution filter is broken

adapting the description to the new classification filter option - #4872

abrviated childlabel can be hidden, contribution to #4906: cyprus: Areas missing in advanced search distribution filter widget

sorting areas in natual order, contribution to #4906: cyprus: Areas missing in advanced search distribution filter widget

better handling of area terms in case of mixed vocabularies

using recommended getTitle method

setting new text for classification filter, solves #4872

applying the fix for #4887 also to the zen SUBTHEME

removing obsolete comment

removing unnecesary enhancement