How can I disable theme update notifications? How can I disable Drupal update notifications for certain themes?

I am using the Drupal Bootstrap 7.x-3.0 Theme which is not the latest version. That is why Drupal sends out a email Update notifications and shows a update warning. I don’t want to miss any module updates, thus I would  like to keep update notification enabled. However I don’t want receive theme update message all time.I didn’t know that this is such difficult approach.

I was looking for a easy solution e.g. theme .info settings or on/off option in Drupals settings.php.
The Update Status Advanced Settings enables you to disable any project, including themes, that you don't want to be alerted about updates for.


  Extends the administrative interface for Drupal core's "Update status" module (added to core in 6.x).
  
  Users of the 5.x Update status contrib module will probably want to use this once they upgrade to 6.x, since some of the functionality in the contrib version was deemed too complicated to include in core. In particular, the per-project settings to ignore certain projects or even specific releases, is absent in the core version of the module. The "Update status advanced settings" module restores these settings, and might eventually provide additional functionality for the core "Update status" module.