Independant manal/auto limits for min and max on axis

[gdargaud]

Here's my suggestion:

Change

SetAxisScalingMode(panel, control,  Axis, scaling, Min, Max)

to

SetAxisScalingMode(panel, control,  Axis, scalingMin, Min, ScalingMax, Max)

so that the lower limit of an axis can be VAL_MANUAL (for instance at 0) while the upper limit can be VAL_AUTOSCALE