get_settings located the ImageMonitor singleton by scanning sys.modules
for any module with 'image_monitor' in its name, a workaround for the
package being importable under two identities. It now uses the same
try-package / except-top-level import as the rest of the API
(_current_image_monitor) and falls back to the configured roots when no
monitor is running.
Vito Sansevero
879247f1ef