fix messaging around invitation success/failure
fix messaging around invitation success/failure

geraspora/diaspora,jhass/diaspora,geraspora/diaspora,geraspora/diaspora,Flaburgan/diaspora,Amadren/diaspora,Flaburgan/diaspora,jhass/diaspora,KentShikama/diaspora,geraspora/diaspora,despora/diaspora,jhass/diaspora,Muhannes/diaspora,KentShikama/diaspora,spixi/diaspora,Amadren/diaspora,Flaburgan/diaspora,Flaburgan/diaspora,diaspora/diaspora,SuperTux88/diaspora,spixi/diaspora,Muhannes/diaspora,despora/diaspora,Amadren/diaspora,Amadren/diaspora,KentShikama/diaspora,despora/diaspora,diaspora/diaspora,diaspora/diaspora,SuperTux88/diaspora,jhass/diaspora,SuperTux88/diaspora,Muhannes/diaspora,KentShikama/diaspora,despora/diaspora,diaspora/diaspora,SuperTux88/diaspora,spixi/diaspora,spixi/diaspora,Muhannes/diaspora