Removing Sametime Chat icon from Mail template

We are in the process of rolling out Notes 8.0.2 (from 6.5). We haven’t yet done any N8 development. I’m customising the mail8 template on a test server & trying to remove all the sametime Chat actions & icons as we are not installing Sametime. My problem is that I can’t remove the Chat icon from the top action bar. Mail8 launches the MailFS frameset which contains the InteriorMailFS & Mail View Frame frameset - which contains the ($Inbox) folder. I’ve successfully removed the chat actions from these elements and the chat icon does not appear when the ($Inbox) folder is viewed in Designer - but it still appears when viewed in the Client. Where am I going wrong? How do I remove the Chat icon?