QSaveFile fails to save a file on Windows, when it is being watched for changes.

I have several applications written in Haskell that monitor changes to sources I'm working on and recompile them on save.

When I start such application and try to edit&save a source from KDE Kate, I get an error telling me it has fail to save. I've tracked this down to `qfsfileengine_win.cpp:551`:

bool ret = ::MoveFileEx((wchar_t*)d->fileEntry.nativeFilePath().utf16(), (wchar_t*)QFileSystemEntry(newName).nativeFilePath().utf16(), MOVEFILE_REPLACE_EXISTING) != 0;

This return false in my case, and `GetLastError()` says `32`, which means

ERROR_SHARING_VIOLATION
32 (0x20)
The process cannot access the file because it is being used by another process.

I guess, when other application watches a file, this function doesn't work.