Load TinyMCE also if there is no text format dropdown


Example:
```python
    atapi.TextField(
        name='text',
        required=False,
        searchable=True,
        allowable_content_types=('text/html', ),
        default_content_type='text/html',
        validators=('isTidyHtmlWithCleanup', ),
        default_input_type='text/html',
        default_output_type='text/x-html-safe',
        widget=atapi.RichWidget(
            label=_(u'label_text',
                    default=u'Text'),
                    rows=25)),
```
This results in no text format dropdown. 

I'll fixed this in `tiny_mce_gzip.js`

cheers