remove folderPane.css from where it is not needed. only the folder pane

and the offline folder select dialog need it.  rs=bienvenu

mailnews/base/prefs/resources/content/AccountManager.xul

@@ -1,6 +1,5 @@
 <?xml version="1.0"?>
 <?xml-stylesheet href="chrome://messenger/skin/messenger.css" type="text/css"?>
-<?xml-stylesheet href="chrome://messenger/skin/folderPane.css" text="text/css"?>
 <?xul-overlay href="chrome://global/content/dialogOverlay.xul"?>
 
 <!DOCTYPE window SYSTEM "chrome://messenger/locale/AccountManager.dtd" >

mailnews/base/resources/content/msgSynchronize.xul

@@ -1,6 +1,5 @@
 <?xml version="1.0"?>
 <?xml-stylesheet href="chrome://messenger/skin/messenger.css" type="text/css"?>
-<?xml-stylesheet href="chrome://messenger/skin/folderPane.css" text="text/css"?>
 
 <!--