title: Product count in Magento layered category navigation
body: <p>I'm new to Magento and I can't work out how to display the number of products in a category in the category list efficiently. I've done it by hacking _renderCategoryMenuItemHtml on the instance of Mage_Catalog_Block_Navigation but it's a stupid hacky solution.</p>
  
  <p>All I want is something like:</p>
  
  <ul>
  <li>Product (1)</li>
  <li>Product (4)</li>
  <li>Product (50)</li>
  </ul>
  
  <p>I've read stuff about /app/design/frontend/default/theme_name/template/catalog/layer/filter.phtml but after adding it to my theme no edits seem to make any effect. I have also tried editing the default and blank versions and no luck. Any suggestions?</p>