The Import app allows you to import XML files from all repositories including those not available with the context menu. The app is accessible in Tools > Import. For more information about using the app see Import and export tool.
The Import app is a 4.5 legacy app installed by the UI AdminCentral module. The Tools app group that this app belongs to is only available to the
superuser role. This is configured in the app launcher layout. The app is configured at Configuration >