fixing displayed extreme values for channels

closes #104 (closed), #96 (closed)

• Correct convertFactor for Centaur's mass position to 1.0e-06
• When fixPoint is 0, round the display lim values to the decimal point that can show the difference between max and min.
• Add unit and valueColors to make channel display similar to log peek and qpeek

UPDATE Parameters SET valueColorsB='L:G|D:G', valueColorsW='L:G|D:G' WHERE param='Input power supply voltage' ;
UPDATE Parameters SET valueColorsB='L:C|D:C', valueColorsW='L:C|D:C' WHERE param='Internal temperature' ;
UPDATE Parameters SET valueColorsB='L:Y|D:Y', valueColorsW='L:Y|D:Y' WHERE param='Time uncertainty' ;
UPDATE Parameters SET valueColorsB='0:R|1:G', valueColorsW='0:R|1:G' WHERE param='Net Up/down';
UPDATE Parameters SET valueColorsB='L:W|D:Y', valueColorsW='L:W|D:Y', height=3 WHERE param='Clock Quality';

UPDATE Channels SET unit='V' WHERE channel='MassPos?' and dataType='RT130';
UPDATE Channels SET unit='V' WHERE channel='Battery Volt' and dataType='RT130';
UPDATE Channels SET unit='mA' WHERE channel='VEC' and dataType='Centaur';
UPDATE Channels SET unit='cm' WHERE channel='VEL' and dataType='Pegasus';
UPDATE Channels SET unit='udeg' WHERE channel='VLA' and dataType='Pegasus';
UPDATE Channels SET unit='udeg' WHERE channel='VLA' and dataType='Pegasus';
UPDATE Channels SET unit='mA' WHERE channel='VE2' and dataType='Pegasus';
UPDATE Channels SET unit='us' WHERE channel='ATU' and dataType='Pegasus';

UPDATE Parameters SET plotType='linesDots', height=2 WHERE param='External SOH channels'

sohstationviewer/view/main_window.py

@@ -772,6 +772,7 @@ class MainWindow(QtWidgets.QMainWindow, UIMainWindow):
         Plot using data from self.data_object with the current options set
             from GUI
         """
+        self.clear_plots()
         if self.has_problem:
             return
         self.is_plotting_soh = True