1. Fixes #0000218: Error reporting in configuration sections is broken. 2. Implemented fully-featured configuration value validation during saving (just put serialized field option array into "Validation" field in ConfigurationAdmin table for given variable). Even "required" check works. Test on "SessionTimeout" variable.
1. Fixes #0000196: Change Location of Website Title in Header. 2. Removed "SiteNameSubTitle" configuration variable, because it's content is now part of logo image in both login screen and administrative console.