VolumeStreaming manager & UI

src/mol-plugin-state/helpers/root-structure.ts

src/mol-plugin-state/manager/structure/hierarchy-state.ts

src/mol-plugin-state/manager/structure/hierarchy.ts

src/mol-plugin-ui/base.tsx

src/mol-plugin-ui/controls.tsx

src/mol-plugin-ui/controls/parameters.tsx

src/mol-plugin-ui/custom/volume.tsx

src/mol-plugin-ui/state/actions.tsx

src/mol-plugin-ui/state/apply-action.tsx

src/mol-plugin-ui/state/common.tsx

src/mol-plugin-ui/state/tree.tsx

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

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

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

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

...-plugin/behavior/dynamic/volume-streaming/transformers.ts

src/mol-plugin/config.ts