Merge pull request #645 from sergeyklay/feature-bootstrap-3

Updated Cerber Theme
Fixed issue: Fixed coding style
Fixed issue: Fixed typos, refactoring in accordance with PSR
Fixed issue: Used fa-fw to set icons at a fixed width.
Fixed issue: Removed role from admin layout
Fixed issue: Used fa-fw to set icons at a fixed width.
Updated feature: Improved user menu. Converted spaces to tabs
Updated feature: Cerber Theme
Updated translation: Amended Russian