Merge pull request #389 from sergeyklay/master

Minor fixes
Fixed issue: Cleanup Comment Core Class
Fixed issue: Cleanup Date helper
Fixed issue: Cleanup Page Controller
Fixed issue: Cleanup Admin Setting Controller
Updated translation: Amended Russian
Fixed issue: Cleanup User library, fixed PHPDoc
Updated translation: Amended Russian
Fixed issue: Improved code readability
Fixed issue: Added type of the inspected object
Fixed issue: Added i18n ability for error messages
Fixed issue: Some CSS fixes for forms
Fixed issue: Fixed comment view
Fixed issue: Cleanup providers view