Revisit connect/disconnect eligibility logic

[axmmisaka]

Currently, to make a connection, two checks are performed:

1. The parent or grandparent of the component being connected must be the component performing the operation
2. The component performing the operation must possess the key to the component being connected

I feel that these two checks overlap and is redundant. It would be best to choose one among these two, or come up with a regression test that will fail if one is missing.