Polish the documentation of appbase.js

Replace the constant App.withMathJax by App.mathJax with is the path to the mathjax script.
Modified accordingly the function to load the library.

It is fill by the controller get_api.

Deploy it in all DbSvc method.
remove the dependence to basesvc.
Use the new helper function as_list

New naming convention.
Remove the configuration controler.

Add 3 tools: define_combined_field, define_field_set and define_wizard.
Draft version of define_field_set.

Create the controller for the plugin_dbui which contains the old controllers configuration.py and database.py