Fix the menulist prpl icons on the addBuddy window (at least on Linux).

im/base/content/instantbird/addbuddy.xul

@@ -37,6 +37,7 @@
    - ***** END LICENSE BLOCK ***** -->
 
 <?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
+<?xml-stylesheet href="chrome://instantbird/skin/account.css" type="text/css"?>
 
 <!DOCTYPE window SYSTEM "chrome://instantbird/locale/addbuddy.dtd">