If you are looking for a little relief after a stressful week of watching the Super Bowl, the Iowa caucus chaos, Trump’s state of the divided union speech and his Senate acquittal vote, there are always a number of theatrical diversions in Chicago.You can travel out to Court Theatre near Hyde Park to take in an entertaining production of Agatha Christie’s murder mystery thriller, “The Mousetrap.” where, directed by Sean Graney, it will be running through Feb. 16.Since its London West End premiere in …