Removed valueToString() methods from SingleView and CompositeView. Implemented instead toDisplay() method in AMCurrentAmplifierView. Added class variables precision_ and format_ to AMCurrentAmplifierView, with getters and setters, that allow each view instance to modify their displays. In the constructor, precision_ = 2 and format_ = 'f', which should take care of any issues the SR570s may have with setting display values.
Changed the context menu provided by AMCurrentAmplifierSingleView. Now the option to change between Gain and Sensitivity modes only appears if both modes are supported AND if you are in Advanced view (no longer appears in Basic view).