FC-0068 docs: reference and how-tos reviewed by edunext 22

[Apgomeznext]

This PR modifies how-to documents migrated from the legacy repositories to the educators' documentation.

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[jswope00]

I would like to see all the related navigation items consistently in the "see also" section for each document.

You can use the links from "Create and Manage Components", plus your additions by splitting the docs:

That would be:
../references/course_development/what_is_a_component.rst
../how-tos/course_development/add_edit_components.rst
add_component.rst
edit_component.rst
duplicate_component.rst
delete_component.rst
../how-tos/course_development/set_component_restrictions.rst
../how-tos/course_development/reorganize_components.rst
../references/course_development/parent_child_components.rst

[Apgomeznext]

@jswope00, I applied the changes you requested and used this PR to erase all the content related to the Qualtrics survey left in the documentation. Feel free to let me know if you have any other comments.
cc. @sarina

[sarina]

Looks good to me, @jswope00 merge whenever you're satisfied. (for PRs like this that have > 10 commits, with lots of little fixup changes, I like to do the "squash and merge" option)