Update qpwgraph to version 0.3.9 / rev 14 via SR 1061753
    
    https://build.opensuse.org/request/show/1061753
    by user dirkmueller + dimstar_suse
    - update to 0.3.9:
      * Whether to draw connectors through or around nodes is now an
      user preference option (cf. View > Connect Through Nodes).