Merge topic 'tutorial-updates'

5e56300742 Tutorial: Refactor Step 10
93289830ea Tutorial: Clarify Step 4 TODO 4
c65e01a979 Tutorial: Clarify Step 3
4f955834cf Tutorial: Fix Step 1 TODO 1 to be expandable

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !8590