only show unload message in production
only show unload message in production

codebuff/mindmaps,shekhargulati/mindmaps-openshift-quickstart,PsyGik/mindmaps,nzheyuti/mindmaps,Scienthusiast/mindmaps,PsyGik/mindmaps,shekhargulati/mindmaps-openshift-quickstart,ericzhai/mindmaps,ericzhai/mindmaps,codebuff/mindmaps,drichard/mindmaps,shekhargulati/mindmaps-openshift-quickstart,codebuff/mindmaps,nzheyuti/mindmaps,ericzhai/mindmaps,Scienthusiast/mindmaps,nzheyuti/mindmaps,drichard/mindmaps,PsyGik/mindmaps,drichard/mindmaps,Scienthusiast/mindmaps