FIX ensure RenderedContent is removed on delete
FIX ensure RenderedContent is removed on delete

nyeholt/silverstripe-microblog,nyeholt/silverstripe-microblog,nyeholt/silverstripe-microblog,Neumes/silverstripe-microblog,nyeholt/silverstripe-microblog,nyeholt/silverstripe-microblog,Neumes/silverstripe-microblog