add: OnClickThreadAndMessagePaneSplitter(); 
context: function MsgToggleMessagePane(){  //OnClickThreadAndMessagePaneSplitter is based on the value before the splitter is toggled.  OnClickThreadAndMessagePaneSplitterGrippy();  MsgToggleSplitter("threadpane-splitter");}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/11af63296339c57a188fc54207fc7bf32f8fe49d/widgetglue.js/clean/mailnews/base/resources/content/widgetglue.js