wip refactoring custom props

src/mol-model-props/common/wrapper.ts

src/mol-model-props/pdbe/structure-quality-report.ts

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

...mol-model/structure/model/properties/custom/collection.ts

...mol-model/structure/model/properties/custom/descriptor.ts

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

src/mol-script/runtime/query/compiler.ts

src/servers/model/test.ts