function catInRightDim(d) {
    var numDims = d.parcatsViewModel.dimensions.length;
    var leftDimInd = d.parcatsViewModel.dimensions[numDims - 1].model.dimensionInd;
    return d.model.dimensionInd === leftDimInd;
}
True if a category view model is in the right-most display dimension
@param {CategoryViewModel} d