Parameter Tree Expandable Parameter Group 'Add' Bug

[Noah]

In the pyqtgraph examples, if you run the parametertree example (4th from the top), go to 'Expandable Parameter Group' (the last group, at the bottom), hover the mouse cursor over 'Add', and scroll down, it acts as though the first item of the drop-down was selected. I came across this when meaning to scroll down the group but instead accidentally made 2 more entries.