Bug 215318 bookmark overflow chevron can overlap bookmark name text r=timeless sr=jag

suite/common/bookmarks/bookmarksMenu.js

@@ -722,6 +722,8 @@ var BookmarksToolbar =
       return;
     var chevron = document.getElementById("bookmarks-chevron");
     var width = buttons.boxObject.x + buttons.boxObject.width;
+    chevron.collapsed = false;
+    var chevronWidth = chevron.boxObject.width;
     chevron.collapsed = true;
     var overflowed = false;
 
@@ -729,7 +731,9 @@ var BookmarksToolbar =
       var button = buttons.childNodes[i];
       button.collapsed = overflowed;
       
-      if (button.boxObject.x + button.boxObject.width > width) {
+      if (i == buttons.childNodes.length - 1)
+        chevronWidth = 0;
+      if (button.boxObject.x + button.boxObject.width + chevronWidth > width) {
         overflowed = true;
         // This button doesn't fit. Show it in the menu. Hide it in the toolbar.
         if (!button.collapsed)