fixes 0004059: Tooltips for Gui::QuantitySpinBox not showing [skip ci]

src/Gui/QuantitySpinBox.cpp

@@ -850,6 +850,16 @@ void QuantitySpinBox::showEvent(QShowEvent * event)
 
 bool QuantitySpinBox::event(QEvent * event)
 {
+    // issue #0004059: Tooltips for Gui::QuantitySpinBox not showing
+    // Here we must not try to show the tooltip of the icon label
+    // because it would override a custom tooltip set to this widget.
+    //
+    // We could also check if the text of this tooltip is empty but
+    // it will fail in cases where the widget is embedded into the
+    // property editor and the corresponding item has set a tooltip.
+    // Instead of showing the item's tooltip it will again show the
+    // tooltip of the icon label.
+#if 0
     if (event->type() == QEvent::ToolTip) {
         if (isBound() && getExpression() && lineEdit()->isReadOnly()) {
             QHelpEvent * helpEvent = static_cast<QHelpEvent*>(event);
@@ -859,6 +869,7 @@ bool QuantitySpinBox::event(QEvent * event)
             return true;
         }
     }
+#endif
 
     return QAbstractSpinBox::event(event);
 }