Changing group name to "" does not remove it from list of groups.
Changing group name to "" does not remove it from list of groups.

git-svn-id: 0d4d1bf2e47502aa0f0957c230a0ec7fa56198fd@3350 b35dd754-fafc-0310-a699-88a17e54d16e

vanitasvitae/smack-omemo,annovanvliet/Smack,lovely3x/Smack,unisontech/Smack,Flowdalic/Smack,mar-v-in/Smack,opg7371/Smack,igorexax3mal/Smack,kkroid/OnechatSmack,ayne/Smack,igniterealtime/Smack,ayne/Smack,dpr-odoo/Smack,chuangWu/Smack,vanitasvitae/smack-omemo,u20024804/Smack,ishan1604/Smack,hy9902/Smack,esl/Smack,vanitasvitae/Smack,igniterealtime/Smack,chuangWu/Smack,ishan1604/Smack,esl/Smack,magnetsystems/message-smack,deeringc/Smack,lovely3x/Smack,vito-c/Smack,vanitasvitae/Smack,igniterealtime/Smack,opg7371/Smack,unisontech/Smack,igorexax3mal/Smack,mar-v-in/Smack,kkroid/OnechatSmack,u20024804/Smack,cjpx00008/Smack,andrey42/Smack,igorexax3mal/Smack,TTalkIM/Smack,magnetsystems/message-smack,cjpx00008/Smack,ayne/Smack,annovanvliet/Smack,xuIcream/Smack,deeringc/Smack,unisontech/Smack,cjpx00008/Smack,andrey42/Smack,qingsong-xu/Smack,ishan1604/Smack,xuIcream/Smack,chuangWu/Smack,hy9902/Smack,xuIcream/Smack,TTalkIM/Smack,Tibo-lg/Smack,Flowdalic/Smack,esl/Smack,qingsong-xu/Smack,TTalkIM/Smack,lovely3x/Smack,dpr-odoo/Smack,hy9902/Smack,vito-c/Smack,qingsong-xu/Smack,vanitasvitae/smack-omemo,dpr-odoo/Smack,deeringc/Smack,vanitasvitae/Smack,u20024804/Smack,mar-v-in/Smack,magnetsystems/message-smack,Tibo-lg/Smack,kkroid/OnechatSmack,Tibo-lg/Smack,opg7371/Smack,Flowdalic/Smack,annovanvliet/Smack,andrey42/Smack