Moving nested parent when child cant be placed

[GabrielKGardner]

How do I go about switching from moving a child element to moving the parent element?

Requirements

1. Only the children can have handles to move them around and re-sort inside of the correct Group
2. Children from other groups can not mix
3. When the child goes past its group it needs to switch from moving the child element to moving the parent element

Group A
  A_foo
  A_bar
  
Group B
  B_baz
  B_qux
  
Group C
  C_john
  C_tim

❌Wrong

Group A
  A_bar
  
Group B
  A_foo (❌ child moved into the wrong group and didn't move the parent)
  B_baz
  B_qux
  
Group C
  C_john
  C_tim

✔️ Correct

Group B
  B_baz
  B_qux

Group A (✔️ instead of moving just the child it moved the whole parent)
  A_bar
  A_foo
  
Group C
  C_tim
  C_john (✔️ children are still able to rearranged )