* Added no_if_activity alert to user script keys
* Added no_if_activity description alert
* Fixes#4648 trigger an alert when no flows are collected
* Changed the time past one call of the alert and an other
* Fixes#4648 reorganized files and cache management
* Added status flow check regarding issue #3417
* Removed debug code
Co-authored-by: matteo <biscosi@ntop.org>
Co-authored-by: Luca Deri <lucaderi@users.noreply.github.com>
