Moved from globally defining ACTION strings to classes with consts

adminlib.php

classes/action.php

classes/form/form_step_instance.php

classes/form/form_trigger_instance.php

classes/local/backup/backup_lifecycle_workflow.php

classes/local/backup/restore_lifecycle_workflow.php

classes/manager/settings_manager.php

classes/manager/step_manager.php

classes/manager/trigger_manager.php

classes/manager/workflow_manager.php

classes/settings_type.php

classes/table/active_automatic_workflows_table.php

classes/table/active_workflows_table.php

classes/table/deactivated_workflows_table.php

classes/table/step_table.php

classes/table/workflow_definition_table.php

classes/table/workflow_table.php

classes/view_controller.php

lib.php

step/createbackup/lib.php