Issue #2096787 by damiankloip, derhasi: Clean up Views area plugins.

...dules/views/lib/Drupal/views/Plugin/views/HandlerBase.php

...ews/lib/Drupal/views/Plugin/views/area/AreaPluginBase.php

...dules/views/lib/Drupal/views/Plugin/views/area/Broken.php

...dules/views/lib/Drupal/views/Plugin/views/area/Entity.php

...ews/lib/Drupal/views/Plugin/views/area/HTTPStatusCode.php

...dules/views/lib/Drupal/views/Plugin/views/area/Result.php

...modules/views/lib/Drupal/views/Plugin/views/area/Text.php

...s/views/lib/Drupal/views/Plugin/views/area/TextCustom.php

...odules/views/lib/Drupal/views/Plugin/views/area/Title.php

...modules/views/lib/Drupal/views/Plugin/views/area/View.php