added screen to see custom variable usages

core/DataTable/Renderer/Csv.php

plugins/CoreHome/CoreHome.php

plugins/CoreHome/angularjs/common/filters/ucfirst.js

plugins/CustomVariables/API.php

plugins/CustomVariables/Archiver.php

plugins/CustomVariables/Controller.php

plugins/CustomVariables/CustomVariables.php

plugins/CustomVariables/Menu.php

plugins/CustomVariables/Model.php

...stomVariables/Tracker/CustomVariablesRequestProcessor.php

...larjs/manage-custom-vars/manage-custom-vars.controller.js

...arjs/manage-custom-vars/manage-custom-vars.directive.html

...ularjs/manage-custom-vars/manage-custom-vars.directive.js

...arjs/manage-custom-vars/manage-custom-vars.directive.less

.../angularjs/manage-custom-vars/manage-custom-vars.model.js

plugins/CustomVariables/lang/en.json

plugins/CustomVariables/templates/manage.twig

plugins/CustomVariables/tests/Integration/ModelTest.php

...lesSystemTest__CustomVariables.getCustomVariables_day.xml

plugins/CustomVariables/tests/UI/.gitignore