Merge branch 'master' into meso

src/mol-data/int/_spec/sorted-ranges.spec.ts

src/mol-data/int/impl/sorted-array.ts

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

src/mol-data/int/segmentation.ts

src/mol-data/int/sorted-ranges.ts

src/mol-geo/geometry/overpaint-data.ts

...ol-model/structure/export/categories/modified-residues.ts

src/mol-model/structure/model/types.ts

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

src/mol-model/structure/structure/properties.ts

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

src/mol-model/structure/structure/unit/links.ts

src/mol-plugin/skin/base/icons.scss

src/mol-plugin/state/transforms/helpers.ts

src/mol-plugin/state/transforms/representation.ts

src/mol-plugin/ui/controls.tsx

src/mol-plugin/ui/plugin.tsx

src/mol-plugin/ui/sequence.tsx

src/mol-plugin/ui/sequence/polymer.ts

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