Fix: __WD_UpdateExtractor reporting success before copy completes

[Danp2]

Pull request

Proposed changes

$bEXEWasFound was set True merely from finding a matching .exe entry in the zip listing, before Shell.Application's CopyHere() (which runs asynchronously) had actually placed the file.

Combined with the old driver being deleted first, a silent copy failure (locked file, AV interference, permission error) left the install directory with no driver at all while _WD_UpdateDriver still reported success.

Now wait (bounded, 10s) for the destination file to appear and base success on that instead.

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