protected void activateCurrentCompletion() {
		T sel = list.getSelectedValue();
		if (sel == null) {
			return;
		}
		setCompletionListVisible(false);
		completionActivated(sel);
	}
Cause the currently-selected suggestion to be activated.

<p>
By default, this is called when the user presses ENTER or clicks a suggestion.
Ghidra/Framework/Docking/src/main/java/docking/widgets/autocomplete/TextFieldAutocompleter.java