config/modules: prepare new view scripts

The controller is still pointing to the former view script, it will
soon be replaced by this ones. As soon as I created two forms handling
enable/disable requests this will be completed.

refs #4095
notifications: improve client- and serverside

This is just a first step, trying to catch a few gotchas:

* it doesn't send notifications to the browser when issueing a redirect
  as redirects can currently not be catched in jQuery response handlers
* it tries to find a better notification handling place in the response
  handler (JS) - still imperfect
* it explicitely stores sessions once modified by notifications. Still
  need to crosscheck whether this is really needed and how we can get
  rid of this.

refs #6280