"Click here to copy existing credits from the series or other episodes" update is terrible

I hate the new design of this box but I can live with it as things change. However, it's usefulness has been seriously degraded. Now, after you select a person from this box, the box closes. Once it closes, you can not reopen it by clicking on it again? Seriously, how did this broken update get rolled out?

And, if you are going to change things, can we make them more useful, not less? This box could use several updates, like sorting by clicking on the column header and being able to have multiple ones open at the same time.