Fix: Update PartDesign Boolean dropdown immediately before recomputation

src/Mod/PartDesign/Gui/TaskBooleanParameters.cpp

@@ -23,6 +23,7 @@
 
 
 #include <QAction>
+#include <QApplication>
 #include <QMessageBox>
 
 
@@ -259,6 +260,9 @@ void TaskBooleanParameters::onTypeChanged(int index)
             pcBoolean->Type.setValue("Fuse");
     }
 
+    // Force UI update before starting heavy computation to show user's selection immediately
+    QApplication::processEvents();
+
     pcBoolean->getDocument()->recomputeFeature(pcBoolean);
 }