I'm not able to reproduce this bug now. But the step basically is:
- Hold the command button.
- Drag an icon from the toolbar.
- Release to delete the icon.
The new version of Orion added two buttons to the toolbar. I already have some buttons there so I removed them.
After that, the toolbar didn't go back to a normal state but stayed in the edit state. The icons continue to wiggle before I reopen the window.