Merge branch 'dev' into feat/assignment-page

# Conflicts:
#	backend/package.json
#	common/src/interfaces/assignment.ts
#	frontend/src/controllers/learning-paths.ts
#	frontend/src/i18n/locale/de.json
#	frontend/src/i18n/locale/en.json
#	frontend/src/i18n/locale/fr.json
#	frontend/src/i18n/locale/nl.json
#	frontend/src/views/assignments/CreateAssignment.vue
#	package-lock.json

frontend/src/i18n/locale/en.json

@@ -89,6 +89,17 @@
     "failed": "failed",
     "wrong": "something went wrong",
     "created": "created",
+    "submitSolution": "Submit solution",
+    "submitNewSolution": "Submit new solution",
+    "markAsDone": "Mark as completed",
+    "groupSubmissions": "This group's submissions",
+    "taskCompleted": "Task completed.",
+    "submittedBy": "Submitted by",
+    "timestamp": "Timestamp",
+    "loadSubmission": "Load",
+    "noSubmissionsYet": "No submissions yet.",
+    "viewAsGroup": "View progress of group...",
+    "assignLearningPath": "assign",
     "group": "Group",
     "description": "Description",
     "no-submission": "no submission",