Styles in TinyMCE

The editor doesn't show the styles any more.
![tiny](https://f.cloud.github.com/assets/157533/1406147/ae083e6c-3d4a-11e3-8d2c-9e06c91dcb27.png)

The problem could be, that the TinyMCE iframe imports the Plone stylesheets:
```
<!-- @import url(http://localhost:8080/onegovmunicipality/portal_css/Sunburst%20Theme/reset.css); -->
<!-- @import url(http://localhost:8080/onegovmunicipality/portal_css/Sunburst%20Theme/collective.js.jqueryui.custom.min.css); -->
<!-- @import url(http://localhost:8080/onegovmunicipality/portal_css/Sunburst%20Theme/deprecated.css); -->
...
```

But the problem is, the subsite specific generated css is in a viewlet and not imported in the editor.