Malaysian leader Mahathir Mohamad’s appointment as interim prime minister just hours after he sent his resignation to the nation’s monarch will see him carry on his duties as per the status quo – and potentially ease him back into power, observers say.The purpose of an interim prime minister is to allow the king to gauge the mood of parliament to see who “truly commands the confidence of members of the house”, said the nation’s foremost constitutional law expert, Shad Saleem Faruqi. The…