Fixed webpage redirection of student feedback submission from student home page to student feedback submission edit page when an user input error occurs.
Re-factored regkey == null with isUserLoggedIn and updated comments for StudentFeedbackSubmissionEditSaveAction::createSpecificRedirectResult()
Added cases for webpage redirection of student feedback submission on whether student is registered/unregistered and error occurence
Merge branch 'master' into Issue2300
Refactor if-else statement in StudentFeedbackSubmissionEditSaveAction:createSpecificRedirectResult()
Refactor code to match with the comments and improved the readability of if-else statement
Refactor if-else statement to improve readability
Added tests for webpage redirection when unregistered student submitted session's responses via the given link
Merge branch 'master' into Issue2300
[2300] Redirect back to feedback submission page if isError==true when submitting responses