After saving a Data Source that's been edited, go back to the Data Sources panel... but to the Sources tab, not the Places tab.
Place Data Source, CartoDB driver. First draft.
All Place Data Source drivers, updated to support 9 "option" fields instead of 4. This was necessitated by CartoDB which uses 3 to log in, then the minimum 2 for Name & Description, then perhaps a filter clause, ...

Expanded setup controller and admin page for editing Place Data Source, to support 9 options.

Place Data Source driver: ArcGIS REST: removed extra/useless oparameter passed to listFields()

Place Data Source driver: CartoDB: added new options: Name & Description field, SQL filter clause
Admin panel, editing a place source: Some better error handling if the fields haven't been loaded yet (e.g. a brand-new source). If you hadn't entered URLs and API keys etc. then the field lists are blank, which made for ugly errors.

Place Data Source driver: OGC WFS. First working draft. Built using some real-world Geoserver output with namespaces and all, but may not fit all cases e.g. MapServer.

Setup controller: the "remoteid" fields are now 100 characters in length, since some hashing systems already push the 50-character limit previously in place.