1. add course access test for newly joined instructor in adminHomePageUiTest
2.found and fixed a typo in studentHomePage
3. fixed related tests

Dev Green
add condition for staging server test
fix testing purpose typo
1.add a method to recover a html-sanitized string to original encoding
2.add a test for above method
3.call this method in instructorCourseStudentListDowloadAction to ensure the display is in correct format
change indentation
add test for student list downloading action with special team name
Disabled the printing of "ignoring tooltip..."
[2274]'/' in team name is messed up in the csv download

fixes #2274
Merge branch 'master' of https://github.com/TEAMMATES/repo
Create and move contribution question (inst edit page) ui tests to own test class.
Fix tests
create test for contrib qn js for disabling invalid giver/recipients
[2266]add tests for sample course of newly joined instructors

fixes #2266
Merge branch 'AccessControl' into dev
Add new test class to testng.xml
[Fixes#75673240] create test for contrib qn js for disabling invalid giver/recipients
Merge remote-tracking branch 'origin/dev' into 75243138
Fix godmode for studentCourseJoinConfirmationUiTest and fix test.
Make const sum qn info visible in preview
hide uncommon options if they are set to default and display text description instead.