add: if (gIsEditableMsgFolder) ShowEditMessageButton(); 
context:     onEndHeaders: function()     {      // WARNING: This is the ONLY routine inside of the message Header Sink that should       // trigger a reflow!            if (this.NotifyClearAddresses != undefined)        NotifyClearAddresses();      ClearHeaderView(gCollapsedHeaderView);      ClearHeaderView(gExpandedHeaderView);            ShowMessageHeaderPane();      UpdateMessageHeaders();//      if (gIsEditableMsgFolder)//        ShowEditMessageButton();    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/cada7ef85c5170e6a5b18503f7639df5d700b7b7/msgHdrViewOverlay.js/clean/mailnews/base/resources/content/msgHdrViewOverlay.js