relative mode modification

src/typica.w

 					arg(number.setNum(temperature.toCelsius().temperature(), 'f',
 									2)));
 			} else {
-				display(QString("%1'C").arg(
-					number.setNum(temperature.toFahrenheit().temperature() * (5/9), 'f', 2)));
+				display(QString("%1'C").
+					arg(number.setNum(temperature.temperature() * (5/9), 'f', 2)));
 			}
 			break;
 		case Units::Kelvin:
 					arg(number.setNum(temperature.toKelvin().temperature(), 'f',
 									2)));
 			} else {
-				display(QString("%1'C").arg(
-					number.setNum(temperature.toFahrenheit().temperature() * (5/9), 'f', 2)));
+				display(QString("%1").
+					arg(number.setNum(temperature.temperature() * (5/9), 'f', 2)));
 			}
 			break;
 		case Units::Rankine: