message: Simplify setting control area to base area
diff: @@ -135,7 +135,7 @@ void ComboBox::lstItemsSelectionChanged()
  {
  txtField.text(lstItems.selectionText());
  lstItems.visible(false);
  - mRect = {mBaseArea.x(), mBaseArea.y(), mBaseArea.width(), mBaseArea.height()};
  + mRect = mBaseArea;
  mSelectionChanged();
  }
  