make :closed match all elements

source

@@ -74560,6 +74560,9 @@ Demos:
 
      A select element which is a drop-down box whose drop-down box
      is open.
+
+     An input element which supports a picker popup and whose picker popup is
+     open.
     
    
 
@@ -74578,7 +74581,10 @@ Demos:
      A dialog element which does not have the 
      data-x="attr-dialog-open">open attribute.
 
-     A select element which is a drop-down box whose drop-down box
+     A select element which is not a drop-down box or whose
+     drop-down box is closed.
+
+     An input element which doesn't support a picker popup or whose picker popup
      is closed.