ENH: Better names for reference options.

src/caosadvancedtools/json_schema_exporter.py

@@ -120,8 +120,11 @@ def _make_segment_from_prop(prop: db.Property, additional_properties: bool,
                                                       name_and_description_in_properties,
                                                       additional_options_for_text_props,
                                                       units_in_description)
+            subschema["title"] = "Create new"
             json_prop["oneOf"] = [
-                {"enum": values},
+                {
+                    "title": "Existing entries",
+                    "enum": values},
                 subschema
             ]