From armrests to overhead bins, air travel has become a test of patience and restraint now that personal space comes at a premium and everything costs extra, says travel website founder Aaron Wong. SINGAPORE: It’s often said that the root cause of all conflicts boils down to ideological differences, competition for scarce resources, or just plain old insanity. If so, then an airplane cabin would be the perfect tinderbox. Case in point: An incident in September on a Cathay Pacific flight, where