Bug 1008647 - fix left padding and remove separator for top show all bookmarks item, r=mak

browser/base/content/browser.xul

@@ -797,10 +797,9 @@
                       oncommand="toggleSidebar('viewBookmarksSidebar');">
               <observes element="viewBookmarksSidebar" attribute="checked"/>
             </menuitem>
-            <menuseparator/>
             <!-- NB: temporary solution for bug 985024, this should go away soon. -->
             <menuitem id="BMB_bookmarksShowAllTop"
-                      class="subviewbutton"
+                      class="menuitem-iconic subviewbutton"
                       label="&showAllBookmarks2.label;"
                       command="Browser:ShowAllBookmarks"
                       key="manBookmarkKb"/>