Give the option to plot three lines for different values and colors

#162 (closed)

This MR also simplify the sample number creating to be easier for plotting functions to control that.

UPDATE Parameters SET plotType="triColorLines", valueColorsB='-1:M|0:R|1:G', valueColorsW='-1:M|0:R|1:G' WHERE param='GPS On/Off/Err';
UPDATE Parameters SET plotType="triColorLines", valueColorsB='-1:O|0:Y|1:R', valueColorsW='-1:O|0:Y|1:R' WHERE param='Error/warning';