[Code Style] administrator/components/com_banners
[Code Style] Clean up plugins

Codestyle fixes for plugins

Cleanup PR
Some more cleanup
[Code Style] administrator/components/com_cache
[Code Style] administrator/components/com_categories
[Code Style] administrator/components/com_checkin. Closes #4524
[Code Style] com_users backend. Closes #4522
[Code Style]  libraries/joomla/utilities folder. Closes #4523
[Code Style] Clean up libraries/joomla/archive. Closes #4525
[Code Style]Clean up libraries/joomla/cache
[Code Style] administrator/components/com_config
[Code Style] Fix my typo.
[Code Style]Clean up libraries/joomla/client
Restore the file
[Code Style]Clean up libraries/joomla/document
[Code Style]Clean up libraries/joomla/facebook
[Code Style]Clean up libraries/joomla/filesystem
[Code Style] components/com_wrapper
[Code Style]Clean up libraries/joomla/form
[Code Style] various changes