Display "???" as label for nodes we know nothing about.
Display "???" as label for nodes we know nothing about.

glawler/watcher-visualization,akbardotinfo/watcher-visualization,akbardotinfo/watcher-visualization,glawler/watcher-visualization,glawler/watcher-visualization,akbardotinfo/watcher-visualization,akbardotinfo/watcher-visualization,glawler/watcher-visualization,akbardotinfo/watcher-visualization,glawler/watcher-visualization