Fix facet value disabling

src/client/components/facet_bar/HierarchicalFacet.js

@@ -167,7 +167,7 @@ class HierarchicalFacet extends Component {
                 // prevent selecting when another facet is still updating:
                 || this.props.someFacetIsFetching
                 // prevent selecting all facet values:
-                || (selectedCount >= this.props.facet.distinctValueCount - 2 && !isSelected)
+                || (selectedCount >= this.props.facet.distinctValueCount - 1 && !isSelected)
               }
               onChange={this.handleCheckboxChange(treeObj)}
               value={treeObj.node.id}