[Mantisbt-help] How can I remove "Add Note" when viewing an issue and only allow it when updating the issue?

[Andrei B. <abe...@in...>]

Actually what I want is to hook to bugnote add / update events and trigger a
bug status change...
I found the custom function custom_function_default_issue_update_validate(
$p_issue_id, $p_new_issue_data, $p_bugnote_text )
that I can use, but it's only triggered by update issue.

Any hints?