The legal community honored a collection of “unsung heroes” for their pro bono service with a virtual ceremony Tuesday evening.The 22nd annual Chicago Bar Association and Chicago Bar Foundation Pro Bono Awards Celebration was, like so many get-togethers in the COVID-19 era, the first to be totally confined to a computer screen.But the trying circumstances underscore the work the recipients have done. The seven attorneys celebrated Tuesday have committed thousands of hours working for disabled veterans, domestic violence …