title: How to display customer attributes in a drop down list using a custom module
body: <p>I have created a custom tab in admin which I need to manage customer attributes.</p>
  
  <p>I would like to load all customer attributes in that section and keep a check box against each attribute.</p>
  
  <p>Such that when ever a check box is checked or unchecked, based on the selection, the columns will be displayed/hidden in Manage Customer Grid.</p>
  
  <p>I would like to know how do I get to display all customer attributes in that section with a checkbox each?</p>