"Unresolved" from Synchronize POM should be add-able

When a dependency is unknown by the IDE (i.e. the SDK), the JAR cannot be resolved as a Maven dependency.
It would be useful to allow the checkbox though: in that case, the IDE would add a commented snippet to be manually completed:
For instance, "Unresolved - nuxeo-automation-core-5.9.3.jar" would be added to the POM as:

    <!-- Added by Nuxeo IDE / Synchronize POM (unresolved nuxeo-automation-core-5.9.3.jar) -->
    <!-- <dependency> -->
    <!-- <groupId>unknown</groupId> -->
    <!-- <artifactId>nuxeo-automation-core</artifactId> -->
    <!-- </dependency> -->