http lib - support for extra fields and fix for ordering issue

This merge request adds support to display generic fields within the symbol chooser.

Users utilizing the HTTP library can now incorporate any quantity of generic fields into the API response, making them accessible through the symbol chooser. Please note that those fields are not carried over to the schematic. The same solution as in the merge request !1910 to the master branch is used and resolves the issue #17570.

HTTP library users will now see the generic fields in the components' properties in the correct order as submitted by the API. Resolves the issue #17584 (closed).