Wrapper for gridLayouts setContentsMargins.

[twip-os]

Since QT6 the "margin" property of the QGridLayout is missing. The contentsMargins property is of QMargins type which can not be used in itom. This wrapper around setContentsMargins enables setting the margins from itom with QT6.

[magro11]

Unfortunately I was not informed by this PR such that I only have seen it today.

Two questions:

• Is it necessary to wrap setContentMargins for QGridLayout although this method is part of the base class QLayout and already wrapped in itom? I would assume, that the wrapped method QLayout::setContentMargins also works for QGridLayout. If not, we should rather ensure this than wrapping the same method again in a derived class.
• Whenever a new wrapper is added, please also alter the documentation in the file sources\itom\docs\userDoc\source\06_extended_gui\qtdesigner.rst.

[twip-os]

You're completely right. It works with the method from QLayout. No idea why I thought this did not work. So this can be closed. Thank you.