Simplified GeoDataFrame subsets cannot provide detailed geometry

[forman]

Expected behavior

We display points instead of original geometry for large GeoDataFrame resources (> 1000 rows). If users click such a point on the Globe, detailed geometries are reloaded.

This should also work for subsets of GeoDataFrame resources.

Actual behavior

Cate fails to reload geometries for GeoDataFrame subsets. On the web console we get the error:

RuntimeError {name: "RuntimeError", message: "Unsupported GeoJSON object type: undefined", stack: "Error↵    at new RuntimeError (D:\Projects\Webstor…de_modules\cesium\Source\ThirdParty\when.js:298:7"}
message: "Unsupported GeoJSON object type: undefined"
name: "RuntimeError"
stack: "Error↵    at new RuntimeError (D:\Projects\WebstormProjects\cate-desktop\app\node_modules\cesium\Source\Core\RuntimeError.js:42:19)↵    at load (D:\Projects\WebstormProjects\cate-desktop\app\node_modules\cesium\Source\DataSources\GeoJsonDataSource.js:868:19)↵    at D:\Projects\WebstormProjects\cate-desktop\app\node_modules\cesium\Source\DataSources\GeoJsonDataSource.js:846:20↵    at Promise.then (D:\Projects\WebstormProjects\cate-desktop\app\node_modules\cesium\Source\ThirdParty\when.js:196:34)↵    at D:\Projects\WebstormProjects\cate-desktop\app\node_modules\cesium\Source\ThirdParty\when.js:297:13↵    at processQueue (D:\Projects\WebstormProjects\cate-desktop\app\node_modules\cesium\Source\ThirdParty\when.js:647:4)↵    at _resolve (D:\Projects\WebstormProjects\cate-desktop\app\node_modules\cesium\Source\ThirdParty\when.js:333:4)↵    at promiseResolve (D:\Projects\WebstormProjects\cate-desktop\app\node_modules\cesium\Source\ThirdParty\when.js:359:11)↵    at Promise.then (D:\Projects\WebstormProjects\cate-desktop\app\node_modules\cesium\Source\ThirdParty\when.js:196:34)↵    at D:\Projects\WebstormProjects\cate-desktop\app\node_modules\cesium\Source\ThirdParty\when.js:298:7"
__proto__: Error

The bug is due to the use of the feature ID as index into the GeoDataFrame instead of the original integer feature index.

Steps to reproduce the problem

1. gdf_1 =read_geo_data_frame("my/large/shapefile.shp")
2. res_1 = data_frame_subset(gdf=gdf_1, geometry="POLYGON ((...))", ...)
3. click point of res_1

Specifications

Cate 2.0.dev1 ... 2.0.dev19