Add the error happened while loading remote code

[Vampire]

Without this for example the stackoverflow error "maybe code is not highlighted properly" is swallowed and only shown in JS console,
while in the error tab it only says "maybe the NoScript extension is causing problems".
Now the error is also displayed.

[leonard84]

Is there error helpful and not confusing for the average user?

[Vampire]

Imho yes.
As I said, if you e.g. use the SO integration and choose a question without groovy formatted code currently you see "noscript plugin maybe interferes" while that is not the problem.
With this change it displays the "maybe the code in the question is not formatted as Groovy" message so it is clear what the problem is and can be fixed in the SO question.