title: Django admin display multiple fields on the same line
body: <p>I have created a model, it will automatically display all the fields from the model and display it on the admin page.</p>
  
  <p>Now, I have a problem, I would like to have two fields on the same line, to do this I have to specify the fieldsets at ModelAdmin:</p>
  
  <pre><code>fieldsets = (
          (None, {
              'fields': (('firstname', 'lastname'),)
          }),
         )
  </code></pre>
  
  <p><strong>Do I have to specify all the fields?</strong> Because there are many fields in the database I need to specify.</p>