Been awhile everyone, coming back to update this topic with the latest way to open a modal from a table row! 
The Legacy Modal component is now deprecated. The current version is called Modal Frame and it has been available to everyone for quite a while now, so most of you have probably already used it!
On your Table component, go to Inspect, add an Event Handler, choose Select row or Click row, then set the Action to Run Script with modalFrame1.show(). Just make sure to replace modalFrame1 with the actual name of your Modal Frame component.
