Bug 439312 - Site Navigation Bar misses its tooltip when minimized. r=neil

suite/browser/linkToolbarOverlay.xul

@@ -54,6 +54,7 @@
 
   <toolbox id="navigator-toolbox">
     <toolbar id="linktoolbar"
+             grippytooltiptext="&linkToolbar.tooltip;"
              class="chromeclass-directories"
              hidden="true"
              hasitems="false"

suite/locales/en-US/chrome/browser/linkToolbar.dtd

@@ -5,6 +5,7 @@
 <!-- Link Toolbar Title -->
 <!ENTITY linkToolbar.label "Website Navigation Bar">
 <!ENTITY linkToolbar.accesskey "a">
+<!ENTITY linkToolbar.tooltip "Website Navigation Bar">
 
 <!-- Link Toolbar visibility options -->
 <!ENTITY linkToolbarAlways.label "Show Always">