No support for dragging gate inside of classically-controlled group

[aatng-gh]

Describe the bug
No support for dragging gate inside of classically-controlled group

To Reproduce
Steps to reproduce the behavior:

1. Drag Measure into classically-controlled group
2. Try to drag Measure out of group
3. Nothing happens

Expected behavior
Should be able to drag Measure gate in / out of classically-controlled group

Screenshots