title: hyperlink in openerp tree view
body: <p>I want to add a link with ftp url in my tree view. i tested with adding widget="url" in my xml ,but its not working.
  Please help
  my code is</p>
  
  <pre><code>&lt;tree string="File Names" &gt;
              &lt;field name="time_created" string="Time Created"/&gt;
              &lt;field name="size" string="Size"/&gt;
               &lt;field name="file_name"/&gt;
               &lt;field name="file_path" widget="url"/&gt;
     &lt;/tree&gt;
  
  class filedata(osv.osv):
      _name = 'filedata'
      _log_access = False
      _columns = {
          'file_name' : fields.char('Name'),
          'file_path' : fields.char('File Path'),
          'time_created' : fields.datetime('Date Time'),
          'size' : fields.char('Size')
      }
  </code></pre>