The old code used a grid layout inside the QGroupBox, but the design
with labels in the first and edit-widgets in the second column lends
itself to a QFormLayout, which adapts the alignment of the widgets to
the platform style, so use that.
Amends 2690822428deec4f0c08f4d118d69a7c6036369e, which, however,
inherited all of the above from even older code.
Pick-to: 6.9 6.8
Change-Id: I528f0ce9d8cb7a997fbfabcdca887c059f571b38
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
9c099ef942