pkg/cli/tk: Fix combobox rendering for empty search.

Co-authored-by: Michael Penick <[email protected]>

pkg/cli/tk/combobox.go

@@ -50,7 +50,13 @@ func (w *comboBox) Render(width, height int) *term.Buffer {
 	// TODO: Test the behavior of Render when height is very small
 	// (https://b.elv.sh/1820)
 	if height == 1 {
-		return w.listBox.Render(width, height)
+		// This could be caused by either the listbox being empty, or the
+		// terminal actually being very short.
+		if w.listBox.CopyState().Items.Len() == 0 {
+			return w.codeArea.Render(width, height)
+		} else {
+			return w.listBox.Render(width, height)
+		}
 	}
 	buf := w.codeArea.Render(width, height-1)
 	bufListBox := w.listBox.Render(width, height-len(buf.Lines))