Bug: null values inside prepareGetFeatureUrl

[jokiefer]

status quo

the prepareGetFeatureUrl function is not null safe

mrmap-react-admin/src/components/MapViewer/MapViewerContext.tsx

Line 147 in 049e625

params.append('SRS', getMapUrl.searchParams.get('SRS'))

This will run in to errors for wms 1.3.0 for example, cause the .get('SRS') will always return null in that case, cause the query param is CRS in version 1.3.0

ToDo

make it null safe for all versions