Revert "Removed deprecated function"

This reverts commit 79a1c927

libs_required/ACG/QtWidgets/QtColorChooserButton.cc

@@ -84,7 +84,7 @@ void QtColorChooserButton::paintEvent(QPaintEvent *ev) {
     initStyleOption(&buttonOptions);
     QStylePainter painter(this);
 
-    const int textWd = buttonOptions.fontMetrics.horizontalAdvance(buttonOptions.text);
+    const int textWd = buttonOptions.fontMetrics.width(buttonOptions.text);
     QRect textRect = buttonOptions.rect;
     textRect.setWidth(std::min(textRect.width(), textWd));
     painter.drawItemText(textRect, Qt::TextSingleLine | Qt::TextShowMnemonic | Qt::AlignVCenter,