UI - Fix $payload undefined code

[rmotitsuki]

Closes #597

Summary

Fix the error about $payload not defined, removing the offending code (line 859)
It seems a debug code that was left in the script.
All other code modifications were trailing whitespace that was automatically removed.

Local Tests

Test the UI.

• select the mef-eline NApp
• open the List of EVC and select one EVC from the list.
• click Save EVC
  The logging tab will pop up the updated messege.
  No browser´s console error should be triggered.

End-to-End Tests

[HeriLFIU]

@rmotitsuki I tested it out and the fix worked well. I was able to update an EVC without getting the undefined payload error.