Internal: Fix study programme graduation stats calculation

Graduation stats calculation failed for many programmes because there were graduations before year 2017. We now skip graduations from years that are not included in the graduationStats object.

Semesters present in Close to graduation page fixed

Close to graduation

• Semesters present column only had gray squares even if the student had enrolled as present. This bug didn't have any effect on the exported Excel files

Custom population: More allowed separators for student numbers

Custom population

• New separators added for student numbers in the search form: commas, semicolons, newlines and spaces (or even a combination of these) are now allowed

Internal

• Fix Sentry settings for frontend (hopefully)

Internal: Use Sentry DSN environment variable

Previously Sentry DSN was hard coded, now it's an configurable environment variable.

Teachers: Fixed crashing

Teachers

• Fixed the application crashing if no teachers were found for a query

Internal

• Tons of refactoring and fixing internal issues

Bachelor Honours visibility fixed on Students page

Students

• Sometimes the Bachelor Honours section on the Students page wasn't displayed, even though it should've been. This has been fixed

Class statistics: Combined Excel removed

Class statistics

• Removed the "Combine Excel" button
  • If you still need this functionality, please download the two separate Excel files and combine them manually

Internal

• Big refactor
  • Language center
  • Students
• Add compression to backend responses
• Fixed 20190821 kone-db migration
• Updated Axios from 0.21.4 to 0.28.1

Class statistics: Accepted grades included

Class statistics

• Accepted grades ("Hyv.") are now also included in the Courses table and the Excel sheet

Courses tab fixed

Class statistics

• Courses tab: Using the student number filter now correctly filters substitutions too

Study guidance groups

• Courses tab: fixed incorrect icons being displayed in the table

Search term minimum length changed to three on Students view

Students

• Previously the search term had to include one word that was at least four characters long. This caused problems with some short names that couldn't be searched. The limit is now three characters

Internal

• Big refactor: Close to graduation done