Bug 154089 "My Sidebar" in Address Book can't show at the first time

r=morse, sr=alecf, a=asa
Thanks for Robin Lu (robin.lu@sun.com)'s fix

xpfe/components/sidebar/resources/sidebarOverlay.js

@@ -1153,6 +1153,8 @@ function SidebarShowHide() {
     if (sidebar_box.firstChild != sidebar_panels_splitter) {
       debug("Showing the panels splitter");
       sidebar_panels_splitter.removeAttribute('hidden');
+      if (sidebar_panels_splitter.getAttribute('state') == 'collapsed')
+        sidebar_panels_splitter.removeAttribute('state');
     }
     sidebar_overlay_init();
     sidebar_menu_item.setAttribute('checked', 'true');