temp push
temp push
function achieved, need to fix test
[Fixes #72936492] Admin can send join link to new instructors
[Fixes #72936492]

1. adjust position for sendNewInstructorJoinLink function in logic
2. remove commented code
move verify method into instructors logic
tweak ui
[Fixes #73658692] Tweak UI for commentsPage
fix the adminInsrtuctorAccountAddAction's verifying method
more testing for ins/stuCommentsPageActionTest
Show an error message to user and continue saving other question responses, instead of Assumption.fail
Merge branch 'master' into 73684624
[Fixes #73684624] remerging - Error when submitting feedback response
Merge branch 'master' into 72936492
[Fixes #72936492] Admin can send join link to new instructors
modify error message
Changed join link in the email sent to new instructors
Merge branch '73684624' of https://github.com/TEAMMATES/repo into 73684624
Merge branch 'master' into 73684624
[Fixes #73684624] re-remerging - Error when submitting feedback response