Use initialGrade as the autograder's grade (#328)

Author: remo5000

src/sagas/backend.ts

@@ -418,8 +418,8 @@ async function getGradingOverviews(tokens: Tokens): Promise<GradingOverview[] |
         assessmentId: overview.assessment.id,
         assessmentName: overview.assessment.title,
         assessmentCategory: capitalise(overview.assessment.type) as AssessmentCategory,
-        initialGrade: overview.grade - (overview.adjustment || 0),
-        currentGrade: overview.grade,
+        initialGrade: overview.grade,
+        currentGrade: overview.grade + (overview.adjustment || 0),
         maximumGrade: overview.assessment.maxGrade,
         studentId: overview.student.id,
         studentName: overview.student.name,