Fixes #4637: Add UI and system variables to configure modified-files and CFEngine outputs retention TTL
Refs #4637: correct Jon's PR (compilation error, type on ajaxText) for modified-files TTL and CFEngine output retention TTL
Merge pull request #479 from ncharles/dev_4637/add_ui_and_system_variables_to_configure_modified_files_and_cfengine_outputs_retention_ttl

Dev 4637/add ui and system variables to configure modified files and cfengine outputs retention ttl