Rolling out now in the latest update for the app (version 1.22052.532.0) is a collapsible notification pane. Also in tow with that is a new ability to search messages in a search messages field. Both of these features were spotted by Aggiornamenti Lumia and tweeted out earlier this month. It's not clear if the third feature part of that initial tweet, which are improvements to in-app notification tiles, is rolling out to everyone, too.
At any rate, you can update your Phone Link app by clicking below. Once you've updated let us know how it is working for you by dropping us a comment below.