By Bethany Wales Shares in the online property portal Rightmove jumped nearly a quarter in early deals this morning after it emerged that Australian property giant REA Group, backed by Rupert Murdoch’s News Corp, is considering a £4.4bn takeover bid for the FTSE 100 company. In a statement to the Australian stock exchange, property search firm REA said it was considering a possible cash and share offer for the entire issued share capital of Rightmove but it was yet to enter any talks with the company. A tie-up between the two could significantly reshape the online property market across two co…