The owner of the Mall at Prince Georges put $30 million into the enclosed Hyattsville center during the past two years, and is gearing up for the opening of &pizza and other restaurants, along with some potential future development. The project, like so many at interior-facing malls these days, turned parts of the mall inside out by creating fast-casual restaurant spaces that open to the outside. Pennsylvania Real Estate Investment Trust is also considering adding residential to the site, a project...