Added support for hierarchic values refs #18878
Removed extra buttons refs #19329
Merged results for hierarchical queries refs #18878
Added result count to parents in hierarchy refs #18878
Fixed bug on filter delete refs #18878
Added option to keep facets visible even if there is only one option to select refs #19329
Code improvements
Added comparators for sorting refs #19386
Added tree representation for the hierarchy refs #19436
Imlemented all features for jstree and facetview refs #19436
Added behavior for node selection in the case of OR operations refs #19213
Bugfix: the operation is no longer a constant parameter of the tree refs #19213
Enabled OR facet option on recall refs #19213
Fix for or search in all cases refs #19213
Switched to controlled vocabulary for hierarchy refs #18878
Bugfix: replaced innerText with textContent for firefox support
Fixed default order display
Changes for performance improvements
Fixed OR button for no hierarchy refs #18878
Fixed 'AND'-'OR' buttons for facets refs #18878