fix: overwrite closeEvent and call super class

bec_widgets/widgets/bec_status_box/bec_status_box.py

@@ -337,7 +337,7 @@ class BECStatusBox(BECConnector, QTreeWidget):
 
     def closeEvent(self, event):
         super().cleanup()
-        QTreeWidget().closeEvent(event)
+        return QTreeWidget.closeEvent(self, event)
 
 
 def main():

bec_widgets/widgets/device_inputs/device_combobox/device_combobox.py

@@ -89,4 +89,4 @@ class DeviceComboBox(DeviceInputBase, QComboBox):
 
     def closeEvent(self, event):
         super().cleanup()
-        QComboBox().closeEvent(event)
+        return QComboBox.closeEvent(self, event)

bec_widgets/widgets/device_inputs/device_line_edit/device_line_edit.py

@@ -101,4 +101,4 @@ class DeviceLineEdit(DeviceInputBase, QLineEdit):
 
     def closeEvent(self, event):
         super().cleanup()
-        QLineEdit().closeEvent(event)
+        return QLineEdit.closeEvent(self, event)

bec_widgets/widgets/scan_control/scan_control.py

@@ -198,7 +198,7 @@ class ScanControl(BECConnector, QWidget):
 
     def closeEvent(self, event):
         self.cleanup()
-        QWidget().closeEvent(event)
+        return QWidget.closeEvent(self, event)
 
 
 # Application example