Comment 11 for bug 1805695

@Wayne, afraid I can't help much on the comment:

    // Clear all annotation in the imported schematic
       to prevent clashes with existing annotation.
    // Must be done after updating the symbol links as
       we need to know about multi-unit parts.

The first half predates me. I just moved it and added the second half about the clear needing to be done after updating the links.