Don't show a warning that notifications are not being sent if only review functionality is used

Merge request opened here https://git.drupalcode.org/project/simple_content_notifications/-/merge_...
Thanks!

aaronpinero → closed merge request !5

@scott_euser thank you for this suggestion. Since there was only one place where I was using the Drupal::messenger() service, I removed it.

I also adjusted the two main functions in the .module file (the hook_cron() and simple_content_notifications_prep()) to perform a check for the enabled status configuration value before doing anything else. This way nothing happens if that part of the module function is not enabled by the administrator.

To help make this more clear, I also adjusted the config forms so that the enable/disable option is the first item in each configuration form.

The changes are committed to the dev branch.

Automatically closed - issue fixed for 2 weeks with no activity.