The search functionality for triggers, conditions and actions is a very handy and fast way of selecting the thing you are looking for. The thing I´d love to see is the ability to just hit Enter to add it to your automation/script/etc when there is only one match left.
EDIT: Yep it does, those UI controls aren’t comboboxes/dropdowns. They are some other custom element, which is why the arrow down, enter isn’t working.