Change listbox back to an auto alias per feedback

Author: zcorpan

css-ui-4/Overview.bs

@@ -1795,7 +1795,7 @@ so that CSS can be used to restyle them.
 
 <pre class="propdef">
 Name: appearance
-Value: ''appearance/none'' | ''auto'' | ''button'' | ''textfield'' | <<compat-none>> | <<compat-auto>>
+Value: ''appearance/none'' | ''auto'' | ''button'' | ''textfield'' | <<compat-auto>>
 Initial: none
 Applies To: all elements
 Inherited: no
@@ -1856,15 +1856,6 @@ Animation type: discrete
 
 		For all other elements, this value has the same effect as ''appearance/auto''.
 
-	<dt><dfn type="">&lt;compat-none></dfn>
-	<dd>
-		These values exist for compatibility of content developed
-		for earlier non standard versions of this property.
-		They all have the same effect as ''appearance/none''.
-		Authors should use the ''appearance/none'' value instead.
-
-		<pre class=prod style="white-space: normal"><<compat-none>> = <dfn>listbox</dfn></pre>
-
 
 	<dt><dfn type="">&lt;compat-auto></dfn>
 	<dd>
@@ -1875,7 +1866,7 @@ Animation type: discrete
 		Issue: When 'auto' is widely supported,
 		recommend using 'auto' instead.
 
-		<pre class=prod style="white-space: normal"><<compat-auto>> =  <dfn>searchfield</dfn> | <dfn>textarea</dfn> | <dfn>push-button</dfn> | <dfn>slider-horizontal</dfn> | <dfn>checkbox</dfn> | <dfn>radio</dfn> | <dfn>square-button</dfn> | <dfn>menulist</dfn> | <dfn>menulist-button</dfn> | <dfn>meter</dfn> | <dfn>progress-bar</pre></dfn>
+		<pre class=prod style="white-space: normal"><<compat-auto>> =  <dfn>searchfield</dfn> | <dfn>textarea</dfn> | <dfn>push-button</dfn> | <dfn>slider-horizontal</dfn> | <dfn>checkbox</dfn> | <dfn>radio</dfn> | <dfn>square-button</dfn> | <dfn>menulist</dfn> | <dfn>menulist-button</dfn> | <dfn>listbox</dfn> | <dfn>meter</dfn> | <dfn>progress-bar</pre></dfn>
 
 		Issue: If any of these value is not needed for web compat,
 		they should be dropped from this list;