const sum question response validation
Change results display for const sum
add stats for const sum - options
fix bug in results filter
Fix const sum response validation
Add stats for const sum - recipients
some changes to save space
change const sum csv output as number instead of string.
Add const sum tests to FeedbackResponseDetailsTest, FeedbackSessionsLogicTest
Change const sum isChangesRequiresResponseDeletion
Fix existing tests in InstructorFeedbackEditUiTest