layer creation: Updates in URL bar each result in a GET request #974
Description
JupyterGIS version
0.9.2
Description
When attempting to create a shapefile layer via URL, each manipulation of the URL inside the field in the layer creation dialog (like adding/removing characters etc.) dispatches a fetch request, which thrashes the data source unnecessarily. In the worst case, typing a ~100 character URL by hand instead of copypasting results in 100 nonsensical network requests.
This is evidenced by examining JupyterLab logs, as well as the barrage of "fetching failed" toasts that appear after a layer import attempt when typing a URL by yourself, or manipulating it as described.
The following screenshot highlights which field I mean (URL elided here):
