add failing tests for non-ascii characters in grade cutoffs on progress page (LMS-2687)
fix bug
Merge pull request #3706 from edx/adam/fix-non-ascii-grade-range

Adam/fix non ascii grade range
Staff Debug includes links to reset/rescore/delete state for a student
Completed delete state
Sarina's edits
Sylvia's edits
Added changes for LMS-2591
Sylvia's edit
change log