Approval in backend

backend/iw/basis.json

@@ -209,6 +209,9 @@
         "starting_before": "Starting before",
         "due_before": "Due before",
         "completed_after": "Completed after",
-        "completed_before": "Completed before"
+        "completed_before": "Completed before",
+        "current": "Current",
+        "upcoming": "Upcoming",
+        "past": "Past"
     }
 }