It’s the bane of a techie’s existence: providing tech support to family and friends, especially at the holidays. But the winners of Microsoft’s Hackathon app think they have a new twist: a remote-access app for smartphones to help out family members. Family Tech Support is a proposed app that will be submitted to broader review at Microsoft and eventually chief executive Satya Nadella for approval. (The link goes to the team’s page, where you can sign up for further information.) Nicole Berdy and her team beat more than 10,000 other applications at Microsoft’s recent Hackathon, which included …