When the user opens the "Expert Configuration" dialog, selects a preference and double clicks it, another dialog is opened to edit the preference value. Clicking "Help" in this second dialog leads to a 404 page not found error.
This patch changes this behavior so that clicking the Help button opens the "Expert Configuration" help page.
Change-Id: I0104617153f710b09c7436b7f5e3faa78cddb2bd
Reviewed-on: https://gerrit.libreoffice.org/c/help/+/126507
Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
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