the window and not the canvas widget. (Closes LP: #973122)
** psensor: used the foreground color defined by the theme for the
font of the graph legend.
-** psensor: used tab layout for psensor preferences .
+** psensor: used tab layout for psensor preferences.
** psensor: temperature unit choice (celcius/fahrenheit).
** psensor-server: fixed --wdir option.
** psensor-server: added log level to -d option.