Measured dimensions of groups with rotated children and horizontal or vertical layout are wrong

Steps to reproduce:
1. Build and run the attached app
2. Compare the sizes of the gray rectangles to the sizes of the groups they are on top of

Actual Results:
The gray rectangles, whose widths and heights are bound to the widths and heights of the groups under them, are not the same size as those groups.

Expected Results:
The gray rectangles should be the same size as the groups. The dimensions that aren't explicitly set on the groups are getting measured incorrectly.

Workaround (if any):

• specifying both width/height on the Group
• specifying minWidth, minHeight on the Rectangle
• not using %width / %height on the Rectangle