External events on td.p2p-col-create div

It wasn't possible to attach external events to adding connections, because the promote method in `CandidatesView` was returning `false`. I changed this by returning `null` and using `preventDefault()`, exactly like was done in the `delete` method in `ConnectionsView`. Be great if you could add this.

I need to create a complex pricing table based on the data from the post being connected and the existing meta fields can't handle that.