FLUID-4907: updated UIO demo

After refactoring the builder, the location of the assembled grade changed. Updated the demo to reflect this.
Merge remote-tracking branch 'yura/FLUID-4907' into FLUID-4907
FLUID-4907: renamed generateGrades function

Renamed the generateGrades function to constructGrades in builder.js. This should help avoid confusion with the generateGrade function. Unit tests updated.
FLUID-4907: More progress on merging builder generated panels and enactors.
FLUID-4907: updated class name map for contrast and text font.