Several small aditions and bugfixes

- implemented advanced options as they should have been, i.e. show/hide
  advanced subnodes
- By default collabse toolbar
- Add toggle to be default expand toolbar
- fix call back of numericStepper
- fix checkboxes: lo_data has to be set to 'true' or 'false' or we have to
  fix xenith.js as well.
- Fix deletion of page in the tree: select and show the previous node