Modify the viewport and the converter accordingly.

- Add new direct method getConfiguration and getTree. Remove obsolete direct method getForm, getGrid and getViewport. Modify the appgridroweditor accordingly.
- Add cfgsvc method get_configuration and get_tree. The method get_form and get_grid are now private. Remove get_viewport.
- Create a new javascript class appviewport and appgridwithfilter. Remove appmgr, appviewportintreebase, appviewportintreeform and appviewportingrid. Modify the javascript translation file accordingly.
- Polish translation and configuration services

New naming convention.
Remove the configuration controler.

Create a default script exposing everything.

Improve the doc string.

Modify the controller default accordingly.