Resolution event is not fired

JSD SLA is rely on Resolution set event which is currently not fired if Workflow has a post-function Set Resolution which is affecting our Reporting and SLA in the project.

Steps to reproduce:

1. Configure Workflow and add post-function to set a Resolution to the status Done
2. Move issue to the status Done
   Expected results: Resolution even is fired
   Actual result: Resolution is set in DB but even wasn't fired, so SLA is never stopped
   

This is happening as well if there is a screen with Resolution set and user choose same resolution which is used in post-fucntion.