rounding temperature as last operation

To avoid loosing precision the rounding should take place after the conversion from Centigrade to Fahrenheit.
I also believe that this conversion is present in one or some CP library, so it could be reused.

WARNING: code not tested
(well I compared the math on another board)

Author: dglaude

PyPortal_User_Interface/code.py

@@ -338,11 +338,11 @@ def switch_view(what_view):
     light = light_sensor.value
 
     if adt:  # Only if we have the temperature sensor
-        tempC = round(adt.temperature)
+        tempC = adt.temperature
     else:  # No temperature sensor
-        tempC = round(microcontroller.cpu.temperature)
+        tempC = microcontroller.cpu.temperature
 
-    tempF = tempC * 1.8 + 32
+    tempF = round(tempC * 1.8 + 32)
     sensor_data.text = 'Touch: {}\nLight: {}\n Temp: {}°F'.format(touch, light, tempF)
 
     # ------------- Handle Button Press Detection  ------------- #