General help

I'm also keen to know how to disable or hide the "more help" link.

There was a solution from 2.x

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If modifying core is not an issue, the easiest way is to modify the function get_formatted_help_string so that it never looks for the language string ending in _link. You would remove the following block:

$helplink = $identifier . '_link';
if ($sm->string_exists($helplink, $component)) {  // Link to further info in Moodle docs.
    ...
}

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But how to do it in 3.9?

Many thanks!