Improve output, including handling uninstalled addon
Improve output, including handling uninstalled addon

vcgato29/heroku,dickeyxxx/heroku,vcgato29/heroku,dickeyxxx/heroku,greeca0204/heroku,rkh/heroku,dickeyxxx/heroku,Faisalawanisee/heroku,rkh/heroku,rkh/heroku,greeca0204/heroku,greeca0204/heroku,gregburek/heroku,gregburek/heroku,macedo/heroku,duypq94/heroku,macedo/heroku,gregburek/heroku,vcgato29/heroku,sancopanco/heroku,sancopanco/heroku,sancopanco/heroku,Faisalawanisee/heroku,duypq94/heroku,macedo/heroku,Faisalawanisee/heroku,duypq94/heroku