In Moodle 3.0 and 3.3, when I click on a help icon, AJAX takes over and displays the help text in a popup balloon within that same page.
In contrast, in Moodle 3.5, when I click on a help icon, a new page is launched (with a URL such as http://server/moodle/help.php?component=local_foo&identifier=howdy&lang=en) in a new browser window to display the help text.
Why does this happen in Moodle 3.5? Is there a new setting that can toggle that behavior? Or, some optional argument that can be passed to the function that renders the help icon?
In all versions of Moodle, I am using the Clean theme, in case that matters.
By help icon, I mean the small circle with a question mark in it that appears to the right of displayed text. For example, the following draws a heading and a help icon.
echo $OUTPUT->heading_with_help( get_string( 'howdy', 'local_foo' ), 'howdy', 'local_foo' );
The result is (in ASCII art):