[css-ui-4] Fix inconsistency

Adjust the text stating that some properties can be ignored in some
cases to take recent changes in the list of possible values into
account.

Author: frivoal

css-ui-4/Overview.bs

@@ -1932,8 +1932,10 @@ so that CSS can be used to restyle them.
 	and activating (for example by clicking) the element would toggle the state as usual.
 </div>
 
-On <a>widgets</a> where the computed value is ''appearance/auto'' or one of the <<compat-auto>> values,
-and on any element where the computed value is ''appearance/button'',
+On <a>widgets</a> where the computed value is ''appearance/auto'',
+''appearance/textfield'',
+''appearance/menulist-button'',
+or one of the <<compat-auto>> values,
 UAs may disregard some CSS properties
 to ensure that the intended appearance is preserved,
 or because these properties may not be meaningful for the chosen appearance.