This replaces the existing iterative implementation of the ToC
generation with an recursive one.
This also solves the problem of skipped headers which causes wrong
leveling of them.
Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>
Right now the full title of an element is may not shown as the space of
the ToC is limited. With this path it'll be shower on hover and this way
provide more useful information.
Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>
