handle conformations in selections, marking, labels

src/mol-data/int/_spec/ordered-set.spec.ts

src/mol-model/structure/structure/element/loci.ts

src/mol-model/structure/structure/element/stats.ts

src/mol-plugin/ui/sequence.tsx

src/mol-plugin/ui/structure/selection.tsx

src/mol-plugin/util/interactivity.ts

src/mol-plugin/util/structure-element-selection.ts

src/mol-theme/label.ts