John Witherow, Britain’s longest-serving editor, took to the stage at the Web Summit in Lisbon. The editor-in-chief of The Times had no slides or fancy projections, just a typed speech on white paper. I bumped into him briefly backstage, and he had asked about his friend, the former Sunday Times Ireland editor Frank Fitzgibbon, as well as Nóirín Hegarty, the former editor of The Sunday Tribune who was recently announced as Fitzgibbon’s successor. Witherow was in Lisbon delivering a keynote speech on the 4th Estate stage, which has also featured luminaries like Nancy Dubuc, the CEO of Vice Media, Nicholas…