Confirm shorter than minDuration submissions

_locales/en/messages.json

@@ -392,5 +392,8 @@
     },
     "minDurationDescription": {
         "message": "Sponsor segments shorter than the set value will be ignored."
-     }
+     },
+    "shortCheck": {
+        "message": "One of the segments is shorter than your minimum duration. Do you still want to submit?"
+    }
 }