This allows setting `.Site.Params.GeekdocCollapseAllSections` which then
behaves as if you would have set `.Page.Params.geekdocCollapseSection`
in all sections.
It is a hard positive switch, so you can not override it per section
once enabled.
Co-authored-by: Robert Kaussow <xoxys@rknet.org>
Co-authored-by: Robert Kaussow <xoxys@rknet.org>