custom props are now included by default

src/apps/viewer/index.ts

src/mol-plugin-state/actions/structure.ts

src/mol-plugin-state/builder/structure/hierarchy-preset.ts

...l-plugin-state/builder/structure/representation-preset.ts

src/mol-plugin-state/builder/structure/representation.ts

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

src/mol-plugin-ui/plugin.tsx

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

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

...dynamic/selection/structure-representation-interaction.ts

src/mol-plugin/util/substructure-parent-helper.ts