[kf6widgetsaddons] New port

[drdanz]

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[BillyONeal]

This is almost certainly unsafe. Can you describe the linker error this is trying to mitigate and why this is acceptable?

[drdanz]

From my understanding, Qt changed something in some recent version, and the functions in removed_api.cpp, are not inlined in windows static builds, so this causes LNK2005 duplicate symbol errors. I think that's a bug in the qt, I'm trying to see if I can fix it in the qtbase port instead, see #50859.