datadiode

[Feature]: Allow to install windows desktop qt6_673_msvc2022

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### Is your feature request related to a problem? qt6_673_msvc2022 exists under an URL other than expected: https://download.qt.io/online/qtsdkrepository/windows_x86/desktop/qt6_673_msvc2022/ ### The solution It would be cool if aqtinstall could install it...

… any missing Microsoft.Cpp.*.user.props files to reduce hassle with Visual Studio 2019+ which no longer creates them by default / Remove an NSIS leftover This happens to fix #10.