We should try out sending clicks across to both clients. (After implementation probably further work will be required to figure out what clicks we actually want to send.)
We could expose a method by which the hosting site forwarded the event in the existing event handler. That might feel natural for those wanting to do some tight integration.
Either way, we'd need a sample page that has buttons we'd want to both share events on and those we'd want to ignore.
Beginnings of #75, propagate clicks across sites when a site opts-in …
…to the clicking.
When #97 is done, we should have a better place to note that TowTruck.cloneClicks is the setting for controlling what elements opt-in to clicks.
Fix #75, add TowTruck.config(). Uses this config for hubBase.
Oops, that commit was for #97, not this ticket
Implemented as much as we'll do, and #503 is for removing the feature.