C++ Code Style Custom settings export append file extension

If the custom settings are exported under ‘Settings / C++ / Code Style’, the required file extension ‘.clang-format’ is not automatically appended to the file name when saving.

If no file extension has been specified for the file name, it would be desirable for the default file extension ‘.clang-format’ to be appended automatically when exporting.

I use the ‘Build-In-Indenter’ for exporting. Further information on exporting/importing can also be found at the bug https://bugreports.qt.io/browse/QTCREATORBUG-32112.