Merge pull request #633 from sergeyklay/feature-bootstrap-3

BS3 updates
Fixed issue: Cleanup Login Widget. Removed not needed here classes
Fixed issue: Additiounal cleanup Login Widget. Removed extra div
Fixed issue: Fixed itemscope for layouts
Fixed issue: Added missed label for pass_confirm
Fixed issue: Minor cleanup PHPDoc
Fixed issue: Added some messages for Confirm Reset Password form
Fixed issue: Fixed file path with validation messages
Updated translation: Fixed Russian
Updated feature: Cerber Theme