hide column picker for offline folder selector r=stephend,sr=sspitzer 120257

mailnews/base/resources/content/msgSelectOffline.xul

@@ -51,7 +51,7 @@ Contributors:
     <keyset id="keyset"/>
     <description class="desc">&MsgSelectDesc.label;</description>
 
-    <outliner id="synchronizeOutliner" flex="1"
+    <outliner id="synchronizeOutliner" flex="1" hidecolumnpicker="true"
               datasources="rdf:msgaccountmanager rdf:mailnewsfolders" ref="msgaccounts:/" flags="dont-build-content"
               onclick="onSynchronizeClick(event);">
       <template>