Nested dependency in mod_feedback fails again

If the feedback contains nested dependencies the items are not checked recursively for dependencies in higher levels. This causes wrong results if the user goes back and forth while competing this feedback.

Steps to reproduce:

Given:

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Question-1
Answers: A, B

Question-2 depends on Question-1 = "A"
Answers: A, B

Question-3 depends on Question-1 = "B"
Answers: A, B

Question-4 depends on Question-2 = "A"
Answers: Yes, No

Question-5 depends on Question-3 = "A"
Answers: Yes, No

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The user does the following steps:

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Sees Question-1
Answer is: A

Sees Question-2
Answer is A

Sees Question-4
Answer is Yes

Goes back till question-1
Sees Question-1
Answer is: B

Sees Question-3
Answer is: A

Sees Question-5
Answer is: Yes
(He also mistakenly sees Question-4 because the dependency is solved)

Submits his answers

On show responses the answer to Question-4 is mistakanly shown.

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