Update question replacement and add "auto-replacement" option

[marcellamaki]

Overview

Since we now have the manual question replacement workflow, we will repurpose that workflow as a way to replace questions by making individual selections.

As a stretch goal for this project, we will also extend the replacement functionality to include an "auto-replace" feature which swaps out the existing question with an unused question from the same resource. However, this issue should focus first on updating the "replace" behavior, and then please check in with Marcella and Jessica about the prioritization of the autoreplace feature.

In this new option, choosing "replace" should simply open the manual selection workflow (with existing selections not-selectable), and replace the chosen question with new selection.

[bhartiRaz]

Hello @marcellamaki could you assign this issue to me?

[MisRob]

Hi @bhartiRaz, thanks for volunteering. This issue is not available. You're welcome to find an unassigned 'help wanted' issue instead. There aren't many available issues right now so it's best to wait and keep an eye on the list. We label new ones on a weekly basis. I'd also invite you to have a look at the contributing guidelines (CONTRIBUTING.md) if you haven't seen them yet. Thank you.