Approval in backend

backend/hsb/basis.json

@@ -205,6 +205,10 @@
         "end": "End",
         "projects": "Projects",
         "tasks": "Tasks",
-        "task": "Task"
+        "task": "Task",
+        "starting_before": "Starting before",
+        "due_before": "Due before",
+        "completed_after": "Completed after",
+        "completed_before": "Completed before"
     }
 }