[#12081] User-friendliness: Add labels for MSQ checkboxes

[weiquu]

Part of #12081
Sub-issue: Add label to MCQ (multiple) question

Outline of Solution

Similar to this PR.

[weiquu]

Not sure about the other question types yet, but seeing as the text questions and MSQ questions use the same solution, I think it's possible to shift the recipient and getAriaLabel() portions into question-edit-answer-form.ts to avoid duplication.

[zhaojj2209]

Not sure about the other question types yet, but seeing as the text questions and MSQ questions use the same solution, I think it's possible to shift the recipient and getAriaLabel() portions into question-edit-answer-form.ts to avoid duplication.

Good idea, the aria label can then be changed to "Response for ..." to cover all question types. Let's make this change so that subsequent PRs are made simpler. getAriaLabel() can then be expanded to cover all possible cases of recipient as we cover the remaining question types.

[zhaojj2209]

LGTM!