[Development] Documentation of new Qt features in qtdoc

[Oswald Buddenhagen]

On Mon, Nov 22, 2021 at 10:43:45AM +0000, Edward Welbourne wrote:
>Documenting it while it's fresh in
>your mind generally leads to a better description, after all,
>
i'm not so sure about that. as seen by the quality of the [ChangeLog] 
entries (in as far as present at all), many people have problems 
switching their perspective to the different audience. doing that with 
some temporal distance might actually help (though the "spatial" 
distance of it being in a different repository certainly also helps).

from the blue-sky-dreams department, i'll re-plug 
https://bugreports.qt.io/browse/QTQAINFRA-933 - basically, all that's 
needed to address the issue at hand would be an additional checkbox 
"high-level item".