fix minor spellings
add gitignore cookies.txt
gitignore
fix gitignore
add clschedule remove btn | fix performance later
fix
fix cookies
fix schedule remove btn performance issue [use  instead of ]
minor edit
add exam time conflict checker
fix check time conflict and cookies system permission
fix cookies permission
fix perm
add cookier err retry
fix cookier err retry
remove experimental schedule builder
minor cleanup
minor changes
fix isSelectedCourse
modify fn: addToSelected to handle added section