avoid displaying a nil message after removing addon closes #409
avoid displaying a nil message after removing addon
closes #409

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