Make prefs skinnable.

suite/common/pref/pref.xul

@@ -21,7 +21,7 @@
    Contributor(s): 
   -->
 
-<?xml-stylesheet href="chrome://pref/skin/pref.css" type="text/css"?>
+<?xml-stylesheet href="chrome://pref/skin/" type="text/css"?>
 <?xul-overlay href="chrome://global/content/dialogOverlay.xul"?>
 
 

suite/common/pref/preftree.xul

@@ -22,6 +22,7 @@
    Contributor(s): 
   -->
 
+<?xml-stylesheet href="chrome://pref/skin/" type="text/css"?>
 
 <!DOCTYPE window SYSTEM "chrome://pref/locale/preftree.dtd" >
 <window xmlns:html="http://www.w3.org/TR/REC-html40"

xpfe/components/prefwindow/resources/content/pref.xul

@@ -21,7 +21,7 @@
    Contributor(s): 
   -->
 
-<?xml-stylesheet href="chrome://pref/skin/pref.css" type="text/css"?>
+<?xml-stylesheet href="chrome://pref/skin/" type="text/css"?>
 <?xul-overlay href="chrome://global/content/dialogOverlay.xul"?>
 
 

xpfe/components/prefwindow/resources/content/preftree.xul

@@ -22,6 +22,7 @@
    Contributor(s): 
   -->
 
+<?xml-stylesheet href="chrome://pref/skin/" type="text/css"?>
 
 <!DOCTYPE window SYSTEM "chrome://pref/locale/preftree.dtd" >
 <window xmlns:html="http://www.w3.org/TR/REC-html40"

xpfe/components/prefwindow/resources/skin/pref.css

@@ -1,3 +1,5 @@
+@import url(chrome://global/skin);
+
 @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to HTML */
 @namespace html url("http://www.w3.org/TR/REC-html40"); /* namespace for XUL elements */