Replaced calls to DialogHelper with calls to QuestionHelper
minor #321 Replaced calls to DialogHelper with calls to QuestionHelper (nacmartin)

This PR was squashed before being merged into the 2.4.x-dev branch (closes #321).

Discussion
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Replaced calls to DialogHelper with calls to QuestionHelper

As `DialogHelper` was deprecated in 2.5, replacing calls to it with calls to `QuestionHelper` is needed. On top of it, 4 days ago a Deprecated Error was introduced in `DialogHelper`, and this causes half of the tests of this bundle to fail.

This pull request fixes #320

Commits
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c4acbf3 Replaced calls to DialogHelper with calls to QuestionHelper