Specifies how decimal places to show when displaying units, such as for TIELineLayer in ruler mode.
Default: 2
Typical results if MeasureDecimalPlaces = 2:
0.00012345 mm displays as 0.00012 mm
0.0012345 mm displays as 0.0012 mm
0.012345 mm displays as 0.012 mm
0.12345 mm displays as 0.12 mm
1.2345 mm displays as 1.23 mm
12.345 mm displays as 12.34 mm
123.45 mm displays as 123.45 mm