Aligning widgets in different layouts

[negritot]

This seems like it would be a common problem.

My dialog consists of two parts:
1. A top section with controls laid out in a QFormLayout.
2. A lower section that consists of a QStackedWidget. On each page of the stack are additional controls laid out in a QFormLayout.

The problem is that the widgets in the top of the dialog do not align with the widgets on the bottom. Is there any way to get these to align correctly? I've attached a trivial example that demonstrates the problem.