Hey, I see the occasional shiny app embedded as an iframe in synapse wiki's, but I can't seem to find an example that wasn't put up there by Kenny, and thus they all are referencing Sage's Shiny resources. When *I* do it, it says I need to add the url to the whitelist. Am I doing it wrong, or is there some way to get synapse wiki's to accept going to x.shiny.io for the content of the iframe?