close the tree win when opening bookmarked files for NERDTreeQuitOnOpen

Author: marty

Diff for: plugin/NERD_tree.vim

@@ -194,6 +194,7 @@ function! s:Bookmark.activate()
         if self.validate()
             let n = s:TreeFileNode.New(self.path)
             call n.open()
+            call s:closeTreeIfQuitOnOpen()
         endif
     endif
 endfunction