Revert "Qt: Try to fix a Visual C++ encoding warning."

Revert gafa8c02 since it didn't work on Windows. Use a pragma to squelch
Visual C++ instead.

Qt's rich text renderer doesn't handle "&apos;". Replace it with "&#x27;".
Remove a QDebug include.

Change-Id: I0e6308efda74a4bc0e67ce841a50a0a9b68f4a8b
Reviewed-on: https://code.wireshark.org/review/4511
Reviewed-by: Gerald Combs <gerald@wireshark.org>