<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Label this issue](https://contributors.gitlab.com/manage-issue?action=label&projectId=278964&issueIid=17785) - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=17785) </details> <!--IssueSummary end--> ### Problem We've added the ability to mark/unmark todos on a collapsed sidebar.  It would be great to take this even further and real time todos in the sidebar. When I comment on an issue that marks a todo as complete, the sidebar should update to reflect that I no longer have a todo. ### Scope - Make todos in issuable sidebar and collapsed sidebar reflect the real status of the object making it a SSOT even across browser tabs