Actions consolidation.

  * Improved action parameters order (actionId, target, event).
  * Implemented "virtual" back action automagically triggered on history back.
  * Implemented fake preventDefault() to "back" virtual action event.
  * Enhaced back event providing fromPage and toPage ids as target object.
    - Enabling this way to redirect to "Are you sure" dialog in near future.
  * Migrated hand-made button handling in userProfile controller to actions.
"modified" userProfile status and funny provisional "youShoudSave" handling.