Changelog for gnome-shell-extension-do-not-disturb-button-15-1.fc26.noarch.rpm :

* Thu May 25 2017 Andrew Toskin - 15-1- Bump to upstream version 15, which adds some more display options.
* Sat Apr 08 2017 Andrew Toskin - 13-1- Update to upstream version 13, which includes some subtle UI changes.
* Tue Mar 14 2017 Andrew Toskin - 11-1- First build accepted into Fedora repos.