1. When reading the config, the required key values should be post-processed. If the value from the config is the ID of a known key, rather than its filename, replace the current value with the filename.
2. When displaying the values in the treeview, display the ID of the file.
3. When building the required-key dropdown list, display the filename following the ID in parentheses.
1. When reading the config, the required key values should be post-processed. If the value from the config is the ID of a known key, rather than its filename, replace the current value with the filename.
2. When displaying the values in the treeview, display the ID of the file.
3. When building the required-key dropdown list, display the filename following the ID in parentheses.