lib/model: Hide temporary files on Windows while they are in use (fixes #4382) #4394
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Purpose
Hide the temp files while we are using them.
Testing
None whatsoever. I'm just assuming that the Hide() call works and that it's valid to call Hide() on an open file. If someone on Windows could confirm that it would be lovely.
I don't think there are any ways out of a temp file other than via sharedPullerState.finalClose - if there are this would result in files becoming permanently hidden which would be bad.