By Harry Rutter & Mollie Quirk Katy Perry has hinted at her next big move after deciding to leave American Idol, where she’s been a judge for seven years. The pop star was seen looking a bit sad last week in London with her partner Orlando Bloom and their little girl Daisy Dove. This comes after the sad loss of her long-time manager Martin Kirkup. So what’s next for Katy after losing a close friend and leaving her TV job? Experts have told The Mirror they think they’ve spotted a big hint. PR expert Rebecca May sat down with us and said Katy is “ready to make waves”. For all the latest on news,…