[Development] Proposal to retain \since version information in Qt Documentation

[Paul Wicking]

> On 25 Sep 2024, at 06:41, EXT Mitch Curtis <mitch.curtis at qt.io> wrote:
> 
> I'm confused... \since does show up in the generated documentation:
> 
> - https://doc.qt.io/qt-6/qml-qtquick-item.html#focusPolicy-prop
> - https://doc.qt.io/qt-6/qml-qtquick-listview.html#displayMarginBeginning-prop
> 

Hey Mitch!

The reason for this is that the `ignoresince` cutoff hasn't been configured for
Qt Quick in the same way it has been for Qt's C++ APIs. This difference stems
from the fact that Qt Quick and QML had their own versioning schemes, which
don't always align directly with the overall Qt version numbers. As a result,
applying the same `ignoresince` configuration across all modules could lead to
inconsistencies or the unintended hiding of relevant version information. 

//! Paul