Backout some expression changes that are causing some test suite fail…

…ures. (visit-dav#3914) (visit-dav#3915)

Update several config site files for 3.0.1. (visit-dav#3673)

Fix explode operator crash on Windows. (visit-dav#3477)

Initialize planeDist. It was being used uninitialized and caused the crash.

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