Metatags styling in modify temlate

This PR adds class ```noeditor``` to metatags (metadescription and metakeywords), so if Scribite is hooked to Pages, these fields to remain simple (no visual editor for them).
This also removes maxLength="255" for metadescription, and also make both fields equal in the form (multiline) - see picture below.
![image](https://cloud.githubusercontent.com/assets/628801/3551430/07da8298-08e7-11e4-9587-cc7f1808bc86.png)