When the list is closed, the arrow points down.
Expected behavior when the button is clicked: open the list.
Working.
When the list is open, the arrow points up.
Expected behavior when the button is clicked: close list.
Does not work.
The list is only closed by selecting a menu item or clicking outside the list or button.
Suggestion: add the ability to close a menu by clicking a button.
There are several such drop-down lists in the program: in Glyphs tab, Waterfall tab and 3 in Settings.