added missing indexes on foreign keys
added missing indexes on foreign keys

mhjb/loomio,loomio/loomio,codingnutty/loomio,gvalerin/loomio,labhackercd/loomio,isomerase/loomio,HadoDokis/loomio,Collabforge/site-collabio,tachyons/loomio,mhjb/loomio,FSFTN/Loomio,aca13jmf/loomio,loomio/loomio,kimihito/loomio,codingnutty/loomio,isomerase/loomio,labhackercd/loomio,wangjun/loomio,piratas-ar/loomio,tachyons/loomio,juliagra/loomio,isomerase/loomio,mhjb/loomio,wangjun/loomio,isomerase/loomio,sicambria/loomio,HadoDokis/loomio,kimihito/loomio,aca13jmf/loomio,HadoDokis/loomio,FSFTN/Loomio,mhjb/loomio,juliagra/loomio,gvalerin/loomio,annewchen/loomio,mlarghydracept/loomio,digideskio/loomio,annewchen/loomio,sicambria/loomio,codingnutty/loomio,FSFTN/Loomio,doomergithub/loomio,digideskio/loomio,Collabforge/site-collabio,doomergithub/loomio,labhackercd/loomio,piratas-ar/loomio,loomio/loomio,mlarghydracept/loomio,mlarghydracept/loomio,Collabforge/site-collabio,digideskio/loomio,HadoDokis/loomio,annewchen/loomio,FSFTN/Loomio,piratas-ar/loomio,gvalerin/loomio,tachyons/loomio,labhackercd/loomio,sicambria/loomio,loomio/loomio,juliagra/DBCloomio,juliagra/DBCloomio,kimihito/loomio,wangjun/loomio,juliagra/DBCloomio,tachyons/loomio,Collabforge/site-collabio,aca13jmf/loomio,doomergithub/loomio,sicambria/loomio,juliagra/loomio,piratas-ar/loomio