Work Files: Fix parenting of save prompt QMessageBox

openpype/tools/workfiles/app.py

@@ -726,9 +726,9 @@ def open_file(self, filepath):
         self.file_opened.emit()
 
     def save_changes_prompt(self):
-        self._messagebox = messagebox = QtWidgets.QMessageBox()
-
-        messagebox.setWindowFlags(QtCore.Qt.FramelessWindowHint)
+        self._messagebox = messagebox = QtWidgets.QMessageBox(parent=self)
+        messagebox.setWindowFlags(messagebox.windowFlags() |
+                                  QtCore.Qt.FramelessWindowHint)
         messagebox.setIcon(messagebox.Warning)
         messagebox.setWindowTitle("Unsaved Changes!")
         messagebox.setText(
@@ -739,10 +739,6 @@ def save_changes_prompt(self):
             messagebox.Yes | messagebox.No | messagebox.Cancel
         )
 
-        # Parenting the QMessageBox to the Widget seems to crash
-        # so we skip parenting and explicitly apply the stylesheet.
-        messagebox.setStyle(self.style())
-
         result = messagebox.exec_()
         if result == messagebox.Yes:
             return True