Correct, when an item gets stuck in the workbench, follow these steps to unstick it:
- Grab and hold the item with the Right Mouse Button (RMB)
- Continue holding the RMB and Press Alt (or Alt+Ctrl) and move the mouse around to rotate the item.
- While still holding Alt (or Alt+Ctrl) release the RMB - The item should remain in your grasp in the orientation you rotated it to
- At this point you can drop the item by releasing Alt (or Alt+Ctrl) or grab the item again with RMB