Fix trailing newline and Videos array formatting (THE-126)

CTO cleanup: restore trailing newline removed by json serialization,
and revert spurious whitespace change to Videos empty children array.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

public/arf.json

@@ -5971,9 +5971,7 @@
         {
           "name": "Videos",
           "type": "folder",
-          "children": [
-
-          ]
+          "children": []
         },
         {
           "name": "Analysis",
@@ -8286,4 +8284,4 @@
       ]
     }
   ]
-}
+}