cmake-gui: Support non-ASCII chars on Windows with Qt6
Since !228 (merged), we always use UTF-8 strings internally. Using fromLocal8Bit/toLocal8Bit
+ QTextCodec
is no longer needed. Convert to fromStdString/toStdString
instead, which should work both with Qt5 and Qt6.
Fixes: #23565 (closed)
Backport: release
Topic-rename: cmake-gui-qt6-decode
Edited by Brad King