emptyDataSetShouldDisplay(... not called when insertRowsAtIndexPaths finishes.

When insertRowsAtIndexPaths is called, the emptyDataSetShouldDisplay(... doesn't trigger, so cells are added to the table and the empty data set image remains.

Workaround:

```
                    self.beginUpdates()
                    self.insertRows(at: indexPaths, with: .right)
                    self.endUpdates()
```

Hope someone can give this a quick look-see!