Able to scale Math Hall graphs down to 0 which distorts them in ContentExamples

All of the graphs in the Math_Hall can be scaled down to 0 which causes the graphs to appear distorted. These should probably be clamped as 1 since scaling them down to 0 does not show any useful information on the graphs themselves.

1. Open ContentExamples in the Editor
2. Open the Math_Hall map and PIE
3. Navigate to Display 1.2
4. Click on the vertical slider on the right and drag it down to 0

Result: The graph becomes distorted and is displayed as completely blue