Extended the ckeditor mathjax plugin and updated site icons

- extmathjax also supports AsciiMATH and MathML, and toggling between
  inline and block view
Forgot some files for extmathjax
Fix some layout issues

- If only one parameter ws present, the form changed lauout if you changed
  the contents, because there were more than 1 non-fixed <td> fields in a
  one line table, made the optional icon columns fixed length
- Moved the newnodes buttons to the right
Update title of new nodes if name of page is changed
Remove unused <div>