Update signal connections error dialog

[ghost]

Before:

After:

I wanted to also update the error text (upper-case "Node" and exclamation mark aren't really needed) but I don't know how that'll affect translations, so I left them alone.

[akien-mga]

I wanted to also update the error text (upper-case "Node" and exclamation mark aren't really needed) but I don't know how that'll affect translations, so I left them alone.

That would mark translations as "fuzzy", which keeps the translated string but the new English one will be used until a translator reviews that fuzzy translation. It's the normal process for updates, so it's fine to make a change now, translators will have time to update before 3.2.

[ghost]

Thanks for the clarification. I've updated the error messages.

[akien-mga]

Thanks!