Minor improvements on the description of tests
Energy Comparison where empty arrays are inserted for unchecked data

Data array always stays the same length, so colors and bar widths are consistent.  Empty arrays of data are inserted into unchecked locations.
Further fixes for label positioning and bar sizing

* Subtracted estimate of x-axis height from measuring code for y axis label
* moved calculation of groupscale into the drawData_ method so it is recalculated on data update
Merge branch 'origin/547-SliderBric'
Wave simulator