- add server navigation configuration, it makes no sense to hide this
from user as it configures just UI
- reorganize Features form a bit to be in sync with Setup
- add DisableShortcutKeys settings to User
- remove LoginCookieValidity from User settings (there are more cookie
related settings and all should be handled same)
Signed-off-by: Michal Čihař <michal@cihar.com>