CHICAGO—Sometimes when it feels as though the world has gone topsy-turvy, it’s a soothing delight to be engaged in life-affirming entertainment from a gentler, more rational past.  Such is the case with the enchanting “Winnie the Pooh: The New Musical Stage Adaptation.” Written and directed by Jonathan Rockefeller, who reimagines Disney’s “Winnie the Pooh” as a  musical adaptation of A.A. Milne’s 1920 story, this production is as sweet as theater gets. While a show about a bear looking for honey may at first seem like something only for kids, at the show I saw, there were as many adults in the theater as children.  It could be that family members just wanted to have an excuse to bring their little ones out after being cooped up inside for so long but, from listening to some of the audience comments, it appeared that adults were happy to be at the show …