title: How to change multiple select field to multiple input fields for a many-to-many case?
body: <p>When I display the ToolBoxEditForm it uses a multiple select field.
  But what I want is a form that lets the user edit each tool he has in the toolbox as a text field. I cant figure out how to do this with the many-to-many field.</p>
  
  <pre><code>class Tool(models.Model):
      tool_name = models.CharField(unique=True, max_length=200)
  ......
  
  class ToolBox(models.Model):
      tools = models.ManyToManyField(Tool,max_length=300)
  
  class ToolBoxEditForm (ModelForm):
      tools = ???
      class Meta:
        model = ToolBox
        exclude  = ('user', 'popularity',)
  </code></pre>