Delete old Admin/Settings controller
Update main site layout and alerts

Update \Site\components\WebUser - add methods for managing alerts:
- setAlert($message, $type, $title)
- getAlerts()

Update a lot of front-end controllers:
- use setAlert() instead of setFlash()

Update a lot of views:
- delete local alert block

Update main site layout:
- add alerts blocks that renders all stored alerts
- add html comments as marks for blocks
Add using forms of names, instruments for declension nouns

Set used storage to 'file' in phpMorphy.
Add migration that creates table {{cached_name_forms}}.
Add CachedNameForm model.

Update User model:
- add constants that represents russian cases of nouns.
- add methods for casting name (separately first_name, last_name and patronymic) to a specific case.

Update a few views to represent using forms of name:
- talks/_talk
- talks/view
- user/index