It would be a great feature to be able to add a customized toolbar action in the same way it is possible to create new service menu items. Reproducible: Always Thanks
Thank you for the bug report. As this report hasn't seen any changes in 5 years or more, we ask if you can please confirm that the issue still persists. If this bug is no longer persisting or relevant please change the status to resolved.
*** Bug 470542 has been marked as a duplicate of this bug. ***