Strangely, though both new links seems correct, a click on them opens my default browser (firefox), but the web page is not opened and title bar and page looks empty. But if I copy the link manually in my browser, it's OK.
More, same behaviour for the link in the configuration of cscope plugin.
Nevertheless, the link at the bottom of configuration of spellchecker plugin works, to help how to configure spellchecker.
Remark: It looks that the text which appears on the windows for cscope ans cppcheck is the text field in the wxs file, but the url field is empty, so it's why the link does not work. More, in that case, the displayed text should not be marked as translatable (with macro _())